General fact: 20173 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 20173 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20173 is a boring number.
Historical date: March 25th is the day in 1996 that an 81-day-long standoff between the anti-government group Montana Freemen and law enforcement near Jordan, Montana, begins.