Fatto generale: 18303 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 18303 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 18303 is an uninteresting number.
Data storica: February 9th is the day in 1964 that the Beatles make their first appearance on The Ed Sullivan Show, performing before a "record-busting" audience of 73 million viewers.