Select 20 unique numbers from 1000 to 9999
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 4,892,721,591,871,638,206,322,166,484,947,502,904,782,660,305,582,886,603,456,512 (~4.8927215918716E+42 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 11,903,512,186,313,715,262,773,512,387,975,743,134,735,198,668,287,795,566,198,263,616,206,210,722,693,120 (~1.1903512186314E+61 million trillion)
If order does not matter (e.g. most lottery numbers): 4,892,721,591,871,638,206,322,166,484,947,502,904,782,660,305,582,886,603,456,512 (~4.8927215918716E+42 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 11,903,512,186,313,715,262,773,512,387,975,743,134,735,198,668,287,795,566,198,263,616,206,210,722,693,120 (~1.1903512186314E+61 million trillion)