Select 20 unique numbers from 1 to 510
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 399,374,647,897,714,557,996,194,776,026,710,016 (~3.9937464789771E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 971,639,382,885,188,238,635,989,636,888,798,338,223,308,350,303,502,336 (~9.7163938288519E+35 million trillion)
If order does not matter (e.g. most lottery numbers): 399,374,647,897,714,557,996,194,776,026,710,016 (~3.9937464789771E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 971,639,382,885,188,238,635,989,636,888,798,338,223,308,350,303,502,336 (~9.7163938288519E+35 million trillion)