Fait général: 20109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 20109 is an uninteresting number.
Date historique: January 20th is the day in 1941 that a Nazi officer is murdered in Bucharest, Romania, sparking a rebellion and pogrom by the Iron Guard, killing 125 Jews and 30 soldiers.