21389244408

Names of 21389244408

• Cardinal: 21389244408 can be written as Twenty-one billion, three hundred eighty-nine million, two hundred forty-four thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.1389244408 × 10¹⁰

Factors of 21389244408

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 5181

Divisors of 21389244408

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 18 21 24 28 29 36 41 42 49 56 58 63 72 82 84 87 98 116 123 126 147 164 168 174 196 203 232 246 252 261 287 294 328 348 369 392 406 441 492 504 522 574 588 609 696 738 812 861 882 984 1044 1148 1176 1189 1218 1421 1476 1624 1722 1764 1827 2009 2088 2296 2378 2436 2583 2842 2952 3444 3528 3567 3654 4018 4263 4756 4872 5099 5166 5684 6027 6888 7134 7308 8036 8323 8526 9512 10198 10332 10701 11368 12054 12789 14268 14616 15297 16072 16646 17052 18081 20396 20664 21402 24108 24969 25578 28536 30594 33292 34104 35693 36162 40792 42804 45891 48216 49938 51156 58261 61188 66584 71386 72324 74907 85608 91782 99876 102312 107079 116522 122376 142772 144648 147871 149814 174783 183564 199752 209059 214158 233044 249851 285544 295742 299628 321237 349566 367128 418118 428316 443613 466088 499702 524349 591484 599256 627177 642474 699132 749553 836236 856632 887226 999404 1035097 1048698 1182968 1254354 1284948 1330839 1398264 1463413 1499106 1672472 1774452 1881531 1998808 2070194 2097396 2248659 2508708 2569896 2661678 2926826 2998212 3105291 3548904 3763062 4140388 4194792 4390239 4497318 5017416 5323356 5853652 5996424 6062711 6210582 7245679 7526124 8280776 8780478 8994636 9315873 10243891 10646712 11707304 12125422 12421164 13170717 14491358 15052248 17560956 17989272 18188133 18631746 20487782 21737037 24250844 24842328 26341434 28982716 30731673 35121912 36376266 37263492 40975564 42438977 43474074 48501688 52682868 54564399 57965432 61463346 65211111 72752532 74526984 81951128 84877954 86948148 92195019 105365736 109128798 122926692 127316931 130422222 145505064 169755908 173896296 184390038 218257596 245853384 254633862 260844444 297072839 339511816 368780076 381950793 436515192 509267724 521688888 594145678 737560152 763901586 891218517 1018535448 1188291356 1527803172 1782437034 2376582712 2673655551 3055606344 3564874068 5347311102 7129748136 10694622204 21389244408
• Sum of all divisors σ(n): 71424990000
• Sum of proper divisors (its aliquot sum) s(n): 50035745592
• 21389244408 is an abundant number, because the sum of its proper divisors (50035745592) is greater than itself. Its abundance is 28646501184

Bases of 21389244408

• Binary: 10011111010111001011111011111111000₂
• Hexadecimal: 0x4FAE5F7F8
• Base-36: 9TQLQM0

Squares and roots of 21389244408

• 21389244408 squared (21389244408²) is 457499776345159270464
• 21389244408 cubed (21389244408³) is 9785574532851948603641471565312
• The square root of 21389244408 is 146250.6219063697
• The cube root of 21389244408 is 2775.8658946725

Scales and comparisons

• 21,389,244,408 seconds is equal to 680 years, 5 weeks, 5 days, 16 hours, 46 minutes, 48 seconds.
• To count from 1 to 21,389,244,408 would take you about one thousand, three hundred sixty 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 21389244408 cubic inches would be around 231.3 feet tall.

Recreational maths with 21389244408

• 21389244408 backwards is 80444298312
• The number of decimal digits it has is: 11
• The sum of 21389244408's digits is 45
• More coming soon!