General fact: 36631 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 36631 is an unremarkable number.
Trivia: 36631 is an uninteresting number.
Historical date: April 16th is the day in 2001 that India and Bangladesh begin a five-day border conflict, but are unable to resolve the disputes about their border.