Fatto generale: 6020 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 6020 is the number of Hamiltonian graphs with 8 vertices.
Trivia: 6020 is a boring number.
Data storica: June 24th is the day in 1932 that a bloodless Revolution instigated by the People's Party ends the absolute power of King Prajadhipok of Siam (now Thailand).