Fait général: 20109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20109 is an uninteresting number.
Culture générale: 20109 is an uninteresting number.
Date historique: January 20th is the day in 1999 that the China News Service announces new government restrictions on Internet use, aimed especially at Internet cafés.