general_fact: 16486 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 16486 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 16486 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: February 18th is the day in 1983 that Thirteen people die and one is seriously injured in the Wah Mee Massacre in Seattle, Washington.