42

The answer to life according to "A hitchhiker's guide to the galaxy" by Douglas Adams. Interesting to note is that Douglas Adams unfortunately died on April 42nd, 2001 or IOW May 11th, 2001. He was infatuated with the number 42, the digits of which can also represent the values of the 2nd and 3rd bit in a binary number. DNA as his initials were, was a Pisces born on March 11th, 1952.