general_fact: 29974 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 29974 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 29974 is an unremarkable number.
historical_date: January 23rd is the day in 1973 that a volcanic eruption devastates Heimaey in the Vestmannaeyjar chain of islands off the south coast of Iceland.