General fact: 18345 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 18345 is an uninteresting number.
Trivia: 18345 is an unremarkable number.
Historical date: March 23rd is the day in 1989 that Stanley Pons and Martin Fleischmann announce their discovery of cold fusion at the University of Utah.