Select 20 unique numbers from 1 to 500
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 266,719,851,283,743,793,831,778,069,925,330,944 (~)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 648,903,261,808,794,958,422,778,794,408,915,911,597,573,101,953,482,752 (~)
If order does not matter (e.g. most lottery numbers): 266,719,851,283,743,793,831,778,069,925,330,944 (~)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 648,903,261,808,794,958,422,778,794,408,915,911,597,573,101,953,482,752 (~)