Select 20 unique numbers from 0 to 500
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 277,810,073,790,344,424,215,791,123,222,757,376 (~2.7781007379034E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 675,884,686,416,229,448,939,986,594,925,575,884,751,685,356,554,813,440 (~6.7588468641623E+35 million trillion)
If order does not matter (e.g. most lottery numbers): 277,810,073,790,344,424,215,791,123,222,757,376 (~2.7781007379034E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 675,884,686,416,229,448,939,986,594,925,575,884,751,685,356,554,813,440 (~6.7588468641623E+35 million trillion)