Fait général: 21495 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21495 is an uninteresting number.
Culture générale: 21495 is an uninteresting number.
Date historique: November 6th is the day in 1528 that Shipwrecked Spanish conquistador Álvar Núñez Cabeza de Vaca becomes the first known European to set foot in Texas.