Fait général: 20017 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20017 is an unremarkable number.
Culture générale: 20017 is a boring number.
Date historique: October 20th is the day in 1873 that Yale, Princeton, Columbia, and Rutgers universities draft the first code of American football rules.