General fact: 24823 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 24823 is an uninteresting number.
Trivia: 24823 is an unremarkable number.
Historical date: December 17th is the day in 1967 that Prime Minister of Australia Harold Holt disappears while swimming near Portsea, Victoria and is presumed drowned.