Fait général: 20171 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20171 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 20171 is an uninteresting number.
Date historique: March 23rd is the day in 1980 that Archbishop Óscar Romero of El Salvador gives his famous speech appealing to men of the El Salvadoran armed forces to stop killing the Salvadorans.