, expanded that comes out to:

13366106203729717328004388722210709492786665116787079998681211538396679042 57002258542540437082120604018254554532752220877241029714047775742577261941 09613444541176172302603663286645854463264937288445086295694459087556423414 54003586455099667570898763628333813977467425743448041919790101558108208093 99622773843557493303936072566175628849198480376677852975353848632178741406 29384506108662379720630796640186963609618784472085076597238473928064543337 33426081417056070362965275011314780315281828339691106215863742591182739466 91344653503173100541371345667910458524894703007645755018974802514018000202 59280426723992440748827784478362058679339056312215147117560639960804631411 98210745160265531358580632240484040861201809726714468061099553945202311832 71993601459028992010811219149063440872721752347878407999908868452636122604 94558259562165437579858706176460479366413382179845201009621940140274984877 31444475919912503314546146199530972857141097807100303128683197139495113964 91308208621769222319152266989884427439480851558015137936373963224053407454 30450382802452342307229276729029591460963393833677311844406302245733535214 83612160000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000 combinations to a 20x20x20 cube

If they actually made 20x20x20 cubes and they were about 1ft on each side (a fairly realistic value) then if there was one 20x20x20 cube for every possible combination they could cover the earth over 2 trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion trillion times (121 trillions). That's how many combinations there are to a 20x20x20 cube.

It's hard to picture a number that large, or to give a physical representation of it but hopefully you get on idea of the magnitude of possible combinations this cube has.

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