Fait général: 21304 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21304 is an uninteresting number.
Culture générale: 21304 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 29th is the day in 1997 that the Chemical Weapons Convention of 1993 enters into force, outlawing the production, stockpiling and use of chemical weapons by its signatories.