Fait général: 21037 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21037 is an uninteresting number.
Culture générale: 21037 is an unremarkable number.
Date historique: August 5th is the day in 1583 that Sir Humphrey Gilbert establishes the first English colony in North America, at what is now St John's, Newfoundland.