21255478272

Names of 21255478272

• Cardinal: 21255478272 can be written as Twenty-one billion, two hundred fifty-five million, four hundred seventy-eight thousand, two hundred seventy-two.

Scientific notation

• Scientific notation: 2.1255478272 × 10¹⁰

Factors of 21255478272

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 12215

Divisors of 21255478272

• Number of divisors d(n): 264
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 54 56 63 64 72 81 84 96 108 112 126 128 144 162 168 189 192 216 224 243 252 256 288 324 336 378 384 432 448 486 504 512 567 576 648 672 756 768 864 896 972 1008 1024 1134 1152 1296 1344 1512 1536 1701 1728 1792 1944 2016 2268 2304 2592 2688 3024 3072 3402 3456 3584 3888 4032 4536 4608 5184 5376 6048 6804 6912 7168 7776 8064 9072 9216 10368 10752 12096 12203 13608 13824 15552 16128 18144 20736 21504 24192 24406 27216 27648 31104 32256 36288 36609 41472 48384 48812 54432 62208 64512 72576 73218 82944 85421 96768 97624 108864 109827 124416 145152 146436 170842 193536 195248 217728 219654 248832 256263 290304 292872 329481 341684 390496 435456 439308 512526 580608 585744 658962 683368 768789 780992 870912 878616 988443 1025052 1171488 1317924 1366736 1537578 1561984 1741824 1757232 1976886 2050104 2306367 2342976 2635848 2733472 2965329 3075156 3123968 3514464 3953772 4100208 4612734 4685952 5271696 5466944 5930658 6150312 6247936 6919101 7028928 7907544 8200416 9225468 9371904 10543392 10933888 11861316 12300624 12495872 13838202 14057856 15815088 16400832 18450936 18743808 20757303 21086784 21867776 23722632 24601248 27676404 28115712 31630176 32801664 36901872 37487616 41514606 42173568 43735552 47445264 49202496 55352808 56231424 63260352 65603328 73803744 83029212 84347136 87471104 94890528 98404992 110705616 112462848 126520704 131206656 147607488 166058424 168694272 189781056 196809984 221411232 253041408 262413312 295214976 332116848 337388544 379562112 393619968 442822464 506082816 590429952 664233696 759124224 787239936 885644928 1012165632 1180859904 1328467392 1518248448 1771289856 2361719808 2656934784 3036496896 3542579712 5313869568 7085159424 10627739136 21255478272
• Sum of all divisors σ(n): 72746384256
• Sum of proper divisors (its aliquot sum) s(n): 51490905984
• 21255478272 is an abundant number, because the sum of its proper divisors (51490905984) is greater than itself. Its abundance is 30235427712

Bases of 21255478272

• Binary: 10011110010111011001101110000000000₂
• Hexadecimal: 0x4F2ECDC00
• Base-36: 9RIYO00

Squares and roots of 21255478272

• 21255478272 squared (21255478272²) is 451795356571464105984
• 21255478272 cubed (21255478272³) is 9603126384995247719970817179648
• The square root of 21255478272 is 145792.5864781883
• The cube root of 21255478272 is 2770.0671295319

Scales and comparisons

• 21,255,478,272 seconds is equal to 675 years, 44 weeks, 4 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,255,478,272 would take you about one thousand, three hundred fifty-one years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21255478272 cubic inches would be around 230.8 feet tall.

Recreational maths with 21255478272

• 21255478272 backwards is 27287455212
• The number of decimal digits it has is: 11
• The sum of 21255478272's digits is 45
• More coming soon!