I am picking the number 23.
Robert Anton Wilson cites William S. Burroughs as being the first person to believe in the 23 enigma. Wilson, in an article in Fortean Times, related the following story:
"(I first heard of) the 23 enigma from William S Burroughs, author of Naked Lunch, Nova Express, etc. According to Burroughs, he had known a certain Captain Clark, around 1960 in Tangier, who once bragged that he had been sailing 23 years without an accident. That very day, Clark’s ship had an accident that killed him and everybody else aboard. Furthermore, while Burroughs was thinking about this crude example of the irony of the gods that evening, a bulletin on the radio announced the crash of an airliner in Florida, USA. The pilot was another captain Clark and the flight was Flight 23."--Wikipedia
"Twenty-three is the ninth prime number, the smallest odd prime that is not a twin prime. Twenty-three is also the fifth factorial prime, the third Woodall prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
The fifth Sophie Germain prime and the fourth safe prime, 23 is the next to last member of the first Cunningham chain of the first kind to have five terms (2, 5, 11, 23, 47). Since 14! + 1 is a multiple of 23 but 23 is not one more than a multiple 14, 23 is a Pillai prime. 23 is the smallest odd prime to be a highly cototient number, as the solution to x − φ(x) for the integers 95, 119, 143, 529.
Twenty-three is the aliquot sum of two integers; the discrete semiprimes 57 and 85 and is the base of the 23-aliquot tree.
23 is the first prime P for which unique factorization of cyclotomic integers based on the Pth root of unity breaks down.
The sum of the first 23 primes is 874, which is divisible by 23, a property shared by few other numbers.
In the list of fortunate numbers, 23 occurs twice, since adding 23 to either the fifth or eighth primorial gives a prime number (namely 2333 and 9699713).
23 also has the distinction of being one of two integers that cannot be expressed as the sum of fewer than 9 cubes of integers (the other is 239). See Waring's problem.
23 reversed is 32 or (2 x 2) x (2 x 2 x 2)
23 is a Wedderburn–Etherington number. The codewords in the perfect (non-extended) binary Golay code are of size 23.
According to the birthday paradox, in a group of 23 (or more) randomly chosen people, the probability is more than 50% that some pair of them will have the same birthday.
There were 23 problems on David Hilbert's famous list of unsolved mathematical problems, presented to the International Congress of Mathematicians in Paris in 1900.
In base 10, 23 is the second Smarandache–Wellin prime, as it is the concatenation of the base 10 representations of the first two primes (2 and 3) and is itself also prime. It is also a happy number in base 10. 23! is 23 digits long in base 10. There are only three other numbers that have this property: 1, 22, and 24.
The natural logarithms of all positive integers lower than 23 are known to have binary BBP-type formulae.
The atomic number of vanadium.
The atomic mass number of the stable isotope of sodium.
Normal human sex cells have 23 chromosomes. Other human cells have 46 chromosomes, arranged in 23 pairs
23 is the TCP/IP port used for telnet and is the default for the telnet command.
Psalm 23, also known as the Shepherd Psalm, is possibly the most quoted and best known Psalm. Psalms is also the 23rd book in the Douay–Rheims Bible.
In Islam, the Qur'an was revealed in a total of 23 years to Muhammad.
In Abhidharma, the number of anomalous generic types (of a possible 72) - e.g., events are considered sui generis because they are not reducible to either mind or matter — is 23.
Principia Discordia, the sacred text of Discordianism, holds that 23 (along with the discordian prime 5) is one of the sacred numbers of Eris, goddess of discord.
Michael Jordan, a star basketball player for the NBA, wore the number 23 on his jerseyThe number 23 has been retired for quite a few prominent athletes. Michael Jordan wore number 23 when he played professional basketball with the Chicago Bulls and, later, the Washington Wizards -- except immediately following his comeback from baseball, when he wore number 45, and for one game in the 1990-91 season against the Orlando Magic when his jersey was stolen and he wore the number 12. Australian cricketer Shane Warne wore the number 23 during his career; Don Mattingly of the New York Yankees wore number 23; the New York Yankees retired the number in 1997. Ryne Sandberg, of the Chicago Cubs, wore number 23, which was retired on August 28, 2005. Bob Nystrom of the New York Islanders wore number 23 and has had the number retired in his honour. Bob Gainey, ex-General Manager and former player for the Montreal Canadiens, had his number 23 retired February 23, 2008. Nathan Scott, a prominent basketball player in the American television serial One Tree Hill, wears the number 23 on his jersey. Zack Greinke, the Cy Young Award Winner in 2009 wears the number 23.
As a tribute to Michael Jordan, David Beckham chose 23 as his shirt number at Real Madrid, and subsequently at LA Galaxy.
Manchester City F.C. have not assigned the squad number 23 to any player since 2003. This is because Marc-Vivien Foé, the player who collapsed and died while playing for Cameroon on June 26, 2003, had held this squad number at Manchester City. Club Brugge KV, a Belgian football team, has done the same when their number 23, François Sterchele died on May 8, 2008 in a car accident.
Former Cleveland Cavaliers forward LeBron James also wore No. 23, simply due to the fact that Michael Jordan was his favorite sports hero growing up, and that his game was patterned after him. Upon joining the Miami Heat in 2010, James abandoned No. 23 and switched to No. 6 (incidentally the multiplication number when 2 was multiplied by 3).
Alfred Harth uses the number 23 in his artist name Alfred 23 Harth, or A23H, since the year 1+9+8+5 = 23.
Several songs and albums use the number 23 as their titles, including Tristan Prettyman's debut album, the eleventh song from Tool's fourth full-length studio album 10,000 Days, "Viginti Tres" (Latin for twenty-three).
Blonde Redhead have the album '23' and the song with the same name.
Jimmy Eat World's song "23" appeared on their album Futures. The number also appears in the songs "Christmas Card" and "12."23".95" as well as on some items of clothing produced by the band.
Four tet and Yellowcard both have songs titled "Twenty-Three".
The Posies have a record called Dear 23
The Church's 2009 studio album is called "Untitled 23"
Spiral Tribe From its inception, the group was obsessed by the number 23. Members sometimes recorded under the moniker of SP23, and the record label itself was called Network 23.
Blink-182's hit song, What's My Age Again? claims that, "nobody likes you when you're 23".
Film and television
23 is a German film about Karl Koch
The Number 23 is a 2007 film starring Jim Carrey.
23 is one of The Numbers - 4, 8, 15, 16, 23, and 42 - featured in Lost.
In The Matrix Reloaded, the Architect tells Neo it is of utmost importance to choose 23 people to repopulate Zion.
In Jeepers Creepers, the Creeper appears every 23 years for 23 days to feast on human flesh.
In the film Vantage Point, all flashbacks take place 23 minutes before the assassination attempt on the president.
As revealed in Japanese film L: Change the World, 23 is the maximum number of days a person may live before he dies by the cause of writing his name in Death Note. Main protagonist L of the film L: Change the World, signs his name in Death Note so to die after 23 days.
The 23 Enigma plays a prominent role in the plot of the Illuminatus! Trilogy by Robert Shea and Robert Anton Wilson.
The 23, in South Africa, refers to the 23 conscientious objectors who publicly refused to do military service in the Apartheid army in 1987. The following years the number increased to 143 (in 1988) and 771 (in 1989), with Apartheid being dismantled from 1990 onwards.
Julius Caesar was stabbed 23 times."--Wikipedia