Fait mathématique: 20229 is an unremarkable number.
Culture générale: 20229 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: May 20th is the day in 1497 that John Cabot sets sail from Bristol, England, on his ship Matthew looking for a route to the west (other documents give a May 2 date).