Fatto generale: 18319 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 18319 is a boring number.
Trivia: 18319 is an unremarkable number.
Data storica: February 25th is the day in 1932 that Adolf Hitler obtains German citizenship by naturalization, which allows him to run in the 1932 election for Reichspräsident.