General fact: 36981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 36981 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 36981 is an unremarkable number.
Historical date: April 1st is the day in 325 that Crown Prince Jin Chengdi, age 4, succeeds his father Jin Mingdi as emperor of the Eastern Jin Dynasty.