general_fact: 16824 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 16824 is a boring number.
trivia: 16824 is an uninteresting number.
historical_date: January 22nd is the day in 2002 that Kmart becomes the largest retailer in United States history to file for Chapter 11 bankruptcy protection.