Fatto generale: 18251 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 18251 is an uninteresting number.
Trivia: 18251 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: December 19th is the day in 1986 that Mikhail Gorbachev, leader of the Soviet Union, releases Andrei Sakharov and his wife from exile in Gorky.