general_fact: 20199 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 20199 is an uninteresting number.
trivia: 20199 is a boring number.
historical_date: April 20th is the day in 1526 that the last ruler of the Lodi Dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat.