Select 20 unique numbers from 1 to 1000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 411,031,684,235,188,409,423,479,815,367,198,258,663,268,652,561,851,835,870,982,623,753,251,578,115,288,930,124,720,674,714,571,585,564,700,349,943,571,272,451,827,334,749,113,552,056,840,647,119,543,687,645,757,440 (~)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,810,000,016,638,207,820,352,628,385,997,173,709,672,172,512,375,453,005,393,626,811,245,058,046,104,467,298,631,036,803,052,675,755,154,339,109,034,296,682,959,998,728,930,345,827,013,356,735,443,265,515,570,201,499,557,018,206,208 (~)
If order does not matter (e.g. most lottery numbers): 411,031,684,235,188,409,423,479,815,367,198,258,663,268,652,561,851,835,870,982,623,753,251,578,115,288,930,124,720,674,714,571,585,564,700,349,943,571,272,451,827,334,749,113,552,056,840,647,119,543,687,645,757,440 (~)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,810,000,016,638,207,820,352,628,385,997,173,709,672,172,512,375,453,005,393,626,811,245,058,046,104,467,298,631,036,803,052,675,755,154,339,109,034,296,682,959,998,728,930,345,827,013,356,735,443,265,515,570,201,499,557,018,206,208 (~)
