Fait général: 21383 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21383 is an uninteresting number.
Culture générale: 21383 is an uninteresting number.
Date historique: July 17th is the day in 1794 that the sixteen Carmelite Martyrs of Compiegne are executed 10 days prior to the end of the French Revolution's Reign of Terror.