Select 20 unique numbers from 8001 to 9999
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 387,898,204,818,810,410,482,981,460,312,763,477,005,879,476,224 (~3.8789820481881E+29 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 943,718,321,471,797,560,353,617,926,306,802,110,226,446,158,585,548,712,893,952,819,200 (~9.437183214718E+47 million trillion)
If order does not matter (e.g. most lottery numbers): 387,898,204,818,810,410,482,981,460,312,763,477,005,879,476,224 (~3.8789820481881E+29 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 943,718,321,471,797,560,353,617,926,306,802,110,226,446,158,585,548,712,893,952,819,200 (~9.437183214718E+47 million trillion)