general_fact: 21827 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 21827 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 21827 is an unremarkable number.
historical_date: October 4th is the day in 1997 that the second largest cash robbery in U.S. history occurs at the Charlotte, North Carolina office of Loomis, Fargo and Company.