Fatto generale: 18051 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 18051 is a boring number.
Trivia: 18051 is a boring number.
Data storica: June 2nd is the day in 1955 that the USSR and Yugoslavia sign the Belgrade declaration and thus normalize relations between both countries, discontinued since 1948.