Fatto generale: 20247 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20247 is a boring number.
Trivia: 20247 is an unremarkable number.
Data storica: June 7th is the day in 1905 that Norway's parliament dissolves its union with Sweden, a vote that is confirmed by a national plebiscite on August 13 of that year.