Select 19 unique numbers from 2 to 21
        Total possible combinations (ways)
        
If order does not matter (e.g. most lottery numbers): 20
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 2,432,902,008,176,640,000 (~2 quintillion)
            
                If order does not matter (e.g. most lottery numbers): 20
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 2,432,902,008,176,640,000 (~2 quintillion)



