Fait général: 20633 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20633 is an uninteresting number.
Culture générale: 20633 is a boring number.
Date historique: June 27th is the day in 2007 that the Brazilian Military Police invades the favelas of Complexo do Alemão in an episode which is remembered as the Complexo do Alemão massacre.