General fact: 18156 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 18156 is an uninteresting number.
Trivia: 18156 is a boring number.
Historical date: September 15th is the day in 1945 that a hurricane in southern Florida and the Bahamas destroys 366 planes and 25 blimps at NAS Richmond.