Fait général: 20210 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20210 is an unremarkable number.
Culture générale: 20210 is an uninteresting number.
Date historique: May 1st is the day in 1707 that the Act of Union joins the Kingdom of England and Kingdom of Scotland to form the Kingdom of Great Britain.