Fatto generale: 18877 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 18877 is an uninteresting number.
Trivia: 18877 is an unremarkable number.
Data storica: September 6th is the day in 1901 that Anarchist Leon Czolgosz shoots and fatally wounds US President William McKinley at the Pan-American Exposition in Buffalo, New York.