Fait général: 9819 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 9819 is an uninteresting number.
Culture générale: 9819 is an uninteresting number.
Date historique: November 18th is the day in 1903 that the Hay-Bunau-Varilla Treaty is signed by the United States and Panama, giving the United States exclusive rights over the Panama Canal Zone.