Fatto generale: 19983 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 19983 is an unremarkable number.
Trivia: 19983 is a boring number.
Data storica: September 16th is the day in 1701 that James Francis Edward Stuart, sometimes called the "Old Pretender", becomes the Jacobite claimant to the thrones of England and Scotland.