Select 20 unique numbers from 1 to 505
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 326,708,427,524,966,450,453,694,765,103,841,280 (~3.2670842752497E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 794,849,589,413,723,096,083,801,853,128,222,396,789,004,116,235,911,168 (~7.9484958941372E+35 million trillion)
If order does not matter (e.g. most lottery numbers): 326,708,427,524,966,450,453,694,765,103,841,280 (~3.2670842752497E+17 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 794,849,589,413,723,096,083,801,853,128,222,396,789,004,116,235,911,168 (~7.9484958941372E+35 million trillion)