general_fact: 24457 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 24457 is an unremarkable number.
trivia: 24457 is an uninteresting number.
historical_date: December 16th is the day in 1920 that the Haiyuan earthquake, magnitude 8.5, rocks the Gansu province in China, killing an estimated 200,000.