Fatto generale: 20303 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20303 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20303 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 2nd is the day in 1873 that the Clay Street Hill Railroad begins operating the first cable car in San Francisco's famous cable car system.