General fact: 20109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 20109 is a boring number.
Trivia: 20109 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: January 20th is the day in 1992 that Air Inter Flight 148 crashes near Strasbourg, France, killing 82 passengers and five crew members.