21981621238920

Names of 21981621238920

• Cardinal: 21981621238920 can be written as Twenty-one trillion, nine hundred eighty-one billion, six hundred twenty-one million, two hundred thirty-eight thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.198162123892 × 10¹³

Factors of 21981621238920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 889937

Divisors of 21981621238920

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 27 28 30 35 36 40 42 45 49 54 56 60 63 70 72 84 90 98 105 108 120 126 135 140 147 168 180 189 196 210 216 245 252 270 280 294 315 360 378 392 420 441 467 490 504 540 588 630 735 756 840 882 934 945 980 1080 1176 1260 1323 1401 1470 1512 1764 1868 1890 1960 2205 2335 2520 2646 2802 2940 3269 3528 3736 3780 4203 4410 4670 5292 5604 5880 6538 6615 7005 7560 8406 8820 9340 9807 10584 11208 12609 13076 13230 14010 16345 16812 17640 18680 19614 21015 22883 25218 26152 26460 28020 29421 32690 33624 39228 42030 45766 49035 50436 52920 56040 58842 63045 65380 68649 78456 84060 88263 91532 98070 100872 114415 117684 126090 130760 137298 147105 168120 176526 183064 196140 205947 228830 235368 252180 274596 294210 343245 353052 392280 411894 441315 457660 504360 549192 588420 617841 686490 706104 823788 882630 889453 915320 1029735 1176840 1235682 1372980 1647576 1765260 1778906 2059470 2471364 2668359 2745960 3089205 3530520 3557812 4118940 4447265 4942728 5336718 6178410 6226171 7115624 8005077 8237880 8894530 10673436 12356820 12452342 13341795 16010154 17789060 18678513 21346872 24015231 24713640 24904684 26683590 31130855 32020308 35578120 37357026 40025385 43583197 48030462 49809368 53367180 56035539 62261710 64040616 74714052 80050770 87166394 93392565 96060924 106734360 112071078 120076155 124523420 130749591 149428104 160101540 168106617 174332788 186785130 192121848 217915985 224142156 240152310 249046840 261499182 280177695 320203080 336213234 348665576 373570260 392248773 415374551 435831970 448284312 480304620 522998364 560355390 653747955 672426468 747140520 784497546 830749102 840533085 871663940 960609240 1045996728 1120710780 1176746319 1246123653 1307495910 1344852936 1568995092 1661498204 1681066170 1743327880 1961243865 2076872755 2241421560 2353492638 2492247306 2614991820 2907621857 3137990184 3322996408 3362132340 3738370959 3922487730 4153745510 4706985276 4984494612 5229983640 5815243714 5883731595 6230618265 6724264680 7476741918 7844975460 8307491020 8722865571 9413970552 9968989224 11215112877 11630487428 11767463190 12461236530 14538109285 14953483836 15689950920 16614982040 17445731142 18691854795 20353352999 22430225754 23260974856 23534926380 24922473060 26168596713 29076218570 29906967672 34891462284 37383709590 40706705998 43614327855 44860451508 47069852760 49844946120 52337193426 56075564385 58152437140 61060058997 69782924568 74767419180 78505790139 81413411996 87228655710 89720903016 101766764995 104674386852 112151128770 116304874280 122120117994 130842983565 149534838360 157011580278 162826823992 174457311420 183180176991 203533529990 209348773704 224302257540 244240235988 261685967130 305300294985 314023160556 348914622840 366360353982 392528950695 407067059980 448604515080 488480471976 523371934260 549540530973 610600589970 628046321112 732720707964 785057901390 814134119960 915900884955 1046743868520 1099081061946 1221201179940 1465441415928 1570115802780 1831801769910 2198162123892 2442402359880 2747702654865 3140231605560 3663603539820 4396324247784 5495405309730 7327207079640 10990810619460 21981621238920
• Sum of all divisors σ(n): 85417469654400
• Sum of proper divisors (its aliquot sum) s(n): 63435848415480
• 21981621238920 is an abundant number, because the sum of its proper divisors (63435848415480) is greater than itself. Its abundance is 41454227176560

Bases of 21981621238920

• Binary: 100111111110111111110101110011011110010001000₂
• Hexadecimal: 0x13FDFEB9BC88
• Base-36: 7SI7TQJ60

Squares and roots of 21981621238920

• 21981621238920 squared (21981621238920²) is 483191672291338835722766400
• 21981621238920 cubed (21981621238920³) is 10621336326108566213285786707217748288000
• The square root of 21981621238920 is 4688456.1679640347
• The cube root of 21981621238920 is 28012.5884037505

Scales and comparisons

• 21,981,621,238,920 seconds is equal to 698,947 years, 29 weeks, 1 day, 11 hours, 42 minutes.
• To count from 1 to 21,981,621,238,920 would take you about one million, seven hundred forty-seven thousand, three hundred sixty-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 21981621238920 cubic inches would be around 2334.4 feet tall.

Recreational maths with 21981621238920

• 21981621238920 backwards is 02983212618912
• 21981621238920 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21981621238920's digits is 54
• More coming soon!