General fact: 18247 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 18247 is an uninteresting number.
Trivia: 18247 is a boring number.
Historical date: December 15th is the day in 1978 that U.S. President Jimmy Carter announces that the United States will recognize the People's Republic of China and cut off all relations with Taiwan.