21205537920

Names of 21205537920

• Cardinal: 21205537920 can be written as Twenty-one billion, two hundred five million, five hundred thirty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.120553792 × 10¹⁰

Factors of 21205537920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 75150

Divisors of 21205537920

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 32 35 36 40 42 45 48 49 56 60 63 64 70 72 80 84 90 96 98 105 112 120 126 128 140 144 147 160 168 180 192 196 210 224 240 245 252 280 288 294 315 320 336 360 384 392 420 441 448 480 490 504 560 576 588 630 640 672 720 735 784 840 882 896 960 980 1008 1120 1152 1176 1260 1344 1440 1470 1568 1680 1764 1920 1960 2016 2205 2240 2352 2520 2688 2880 2940 3136 3360 3528 3920 4032 4410 4480 4704 5040 5760 5880 6272 6720 7056 7840 8064 8820 9408 10080 11760 13440 14112 15680 17640 18816 20160 23520 28224 31360 35280 40320 47040 56448 70560 75133 94080 141120 150266 225399 282240 300532 375665 450798 525931 601064 676197 751330 901596 1051862 1126995 1202128 1352394 1502660 1577793 1803192 2103724 2253990 2404256 2629655 2704788 3005320 3155586 3380985 3606384 3681517 4207448 4507980 4733379 4808512 5259310 5409576 6010640 6311172 6761970 7212768 7363034 7888965 8414896 9015960 9466758 9617024 10518620 10819152 11044551 12021280 12622344 13523940 14425536 14726068 15777930 16829792 18031920 18407585 18933516 21037240 21638304 22089102 23666895 24042560 25244688 27047880 28851072 29452136 31555860 33133653 33659584 36063840 36815170 37867032 42074480 43276608 44178204 47333790 48085120 50489376 54095760 55222755 58904272 63111720 66267306 67319168 72127680 73630340 75734064 84148960 86553216 88356408 94667580 100978752 108191520 110445510 117808544 126223440 132534612 144255360 147260680 151468128 165668265 168297920 176712816 189335160 201957504 216383040 220891020 235617088 252446880 265069224 294521360 302936256 331336530 336595840 353425632 378670320 432766080 441782040 471234176 504893760 530138448 589042720 605872512 662673060 706851264 757340640 883564080 1009787520 1060276896 1178085440 1325346120 1413702528 1514681280 1767128160 2120553792 2356170880 2650692240 3029362560 3534256320 4241107584 5301384480 7068512640 10602768960 21205537920
• Sum of all divisors σ(n): 85181669820
• Sum of proper divisors (its aliquot sum) s(n): 63976131900
• 21205537920 is an abundant number, because the sum of its proper divisors (63976131900) is greater than itself. Its abundance is 42770593980

Bases of 21205537920

• Binary: 10011101111111100101101010010000000₂
• Hexadecimal: 0x4EFF2D480
• Base-36: 9QP89S0

Squares and roots of 21205537920

• 21205537920 squared (21205537920²) is 449674838476557926400
• 21205537920 cubed (21205537920³) is 9535596838984524139351769088000
• The square root of 21205537920 is 145621.2138391931
• The cube root of 21205537920 is 2767.8959776917

Scales and comparisons

• 21,205,537,920 seconds is equal to 674 years, 14 weeks, 11 hours, 12 minutes.
• To count from 1 to 21,205,537,920 would take you about one thousand, three hundred forty-eight 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 21205537920 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205537920

• 21205537920 backwards is 02973550212
• 21205537920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21205537920's digits is 36
• More coming soon!