21381306912

Names of 21381306912

• Cardinal: 21381306912 can be written as Twenty-one billion, three hundred eighty-one million, three hundred six thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 2.1381306912 × 10¹⁰

Factors of 21381306912

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 805

Divisors of 21381306912

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 17 18 21 24 27 28 32 34 36 42 48 51 54 56 63 68 72 81 84 96 102 103 108 112 119 126 136 144 153 162 168 189 204 206 216 224 238 252 272 288 306 309 324 336 357 378 408 412 432 459 476 504 544 567 612 618 648 672 673 714 721 756 816 824 864 918 927 952 1008 1071 1134 1224 1236 1296 1346 1377 1428 1442 1512 1632 1648 1751 1836 1854 1904 2016 2019 2142 2163 2268 2448 2472 2592 2692 2754 2781 2856 2884 3024 3213 3296 3502 3672 3708 3808 4038 4284 4326 4536 4711 4896 4944 5253 5384 5508 5562 5712 5768 6048 6057 6426 6489 7004 7344 7416 8076 8343 8568 8652 9072 9422 9639 9888 10506 10768 11016 11124 11424 11441 11536 12114 12257 12852 12978 14008 14133 14688 14832 15759 16152 16686 17136 17304 18144 18171 18844 19278 19467 21012 21536 22032 22248 22882 23072 24228 24514 25704 25956 28016 28266 29664 31518 32304 33372 34272 34323 34608 36342 36771 37688 38556 38934 42024 42399 44064 44496 45764 47277 48456 49028 51408 51912 54513 56032 56532 58401 63036 64608 66744 68646 69216 69319 72684 73542 75376 77112 77868 80087 84048 84798 88992 91528 94554 96912 98056 102816 102969 103824 109026 110313 113064 116802 126072 127197 133488 137292 138638 141831 145368 147084 150752 154224 155736 160174 168096 169596 183056 189108 193824 196112 205938 207648 207957 218052 220626 226128 233604 240261 252144 254394 266976 274584 277276 283662 290736 294168 308448 308907 311472 320348 330939 339192 366112 378216 381591 392224 411876 415914 436104 441252 452256 467208 480522 485233 504288 508788 549168 554552 567324 581472 588336 617814 622944 623871 640696 661878 678384 720783 756432 763182 823752 831828 872208 882504 926721 934416 961044 970466 992817 1017576 1098336 1109104 1134648 1176672 1178423 1235628 1247742 1281392 1323756 1356768 1441566 1455699 1512864 1526364 1647504 1663656 1744416 1765008 1853442 1868832 1871613 1922088 1940932 1985634 2035152 2162349 2218208 2269296 2356846 2471256 2495484 2562784 2647512 2883132 2911398 3052728 3295008 3327312 3530016 3535269 3706884 3743226 3844176 3881864 3971268 4070304 4324698 4367097 4538592 4713692 4942512 4990968 5295024 5614839 5766264 5822796 6105456 6487047 6654624 7070538 7413768 7486452 7688352 7763728 7942536 8248961 8649396 8734194 9427384 9885024 9981936 10590048 10605807 11229678 11532528 11645592 12210912 12974094 13101291 14141076 14827536 14972904 15527456 15885072 16497922 17298792 17468388 18854768 19963872 21211614 22459356 23065056 23291184 24746883 25948188 26202582 28282152 29655072 29945808 31770144 31817421 32995844 34597584 34936776 37709536 39303873 42423228 44918712 46582368 49493766 51896376 52405164 56564304 59891616 63634842 65991688 69195168 69873552 74240649 78607746 84846456 89837424 95452263 98987532 103792752 104810328 113128608 127269684 131983376 139747104 148481298 157215492 169692912 179674848 190904526 197975064 207585504 209620656 222721947 254539368 263966752 296962596 314430984 339385824 381809052 395950128 419241312 445443894 509078736 593925192 628861968 668165841 763618104 791900256 890887788 1018157472 1187850384 1257723936 1336331682 1527236208 1781775576 2375700768 2672663364 3054472416 3563551152 5345326728 7127102304 10690653456 21381306912
• Sum of all divisors σ(n): 76945220352
• Sum of proper divisors (its aliquot sum) s(n): 55563913440
• 21381306912 is an abundant number, because the sum of its proper divisors (55563913440) is greater than itself. Its abundance is 34182606528

Bases of 21381306912

• Binary: 10011111010011011001101101000100000₂
• Hexadecimal: 0x4FA6CDA20
• Base-36: 9TLVM00

Squares and roots of 21381306912

• 21381306912 squared (21381306912²) is 457160285265138975744
• 21381306912 cubed (21381306912³) is 9774684367231407734715787542528
• The square root of 21381306912 is 146223.4827652521
• The cube root of 21381306912 is 2775.5224798531

Scales and comparisons

• 21,381,306,912 seconds is equal to 679 years, 44 weeks, 4 days, 19 hours, 55 minutes, 12 seconds.
• To count from 1 to 21,381,306,912 would take you about one thousand, three hundred fifty-nine 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 21381306912 cubic inches would be around 231.3 feet tall.

Recreational maths with 21381306912

• 21381306912 backwards is 21960318312
• 21381306912 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21381306912's digits is 36
• More coming soon!