Fait général: 18768 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 18768 is an unremarkable number.
Culture générale: 18768 is an unremarkable number.
Date historique: May 20th is the day in 1609 that Shakespeare's sonnets are first published in London, perhaps illicitly, by the publisher Thomas Thorpe.