Fatto generale: 2090 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2090 is the number of possible rows in a 17×17 crossword puzzle.
Trivia: 2090 is a boring number.
Data storica: September 20th is the day in 1519 that Ferdinand Magellan sets sail from Sanlúcar de Barrameda with about 270 men on his expedition to circumnavigate the globe.