General fact: 9918 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 9918 is the maximum number of pieces a torus can be cut into with 38 cuts.
Trivia: 9918 is an unremarkable number.
Historical date: February 25th is the day in 1919 that Oregon places a 1 cent per U.S. gallon tax on gasoline, becoming the first U.S. state to levy a gasoline tax.