Fatto generale: 17904 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 17904 is a boring number.
Trivia: 17904 is an uninteresting number.
Data storica: January 6th is the day in 1930 that the first diesel-engined automobile trip is completed, from Indianapolis, Indiana, to New York, New York.