Hecho general: 13818 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 13818 is a boring number.
Trivia: 13818 is a boring number.
Fecha histórica: October 30th is the day in 1973 that the Bosporus Bridge in Istanbul, Turkey is completed, connecting the continents of Europe and Asia over the Bosporus for the first time.