21212694720

Names of 21212694720

• Cardinal: 21212694720 can be written as Twenty-one billion, two hundred twelve million, six hundred ninety-four thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.121269472 × 10¹⁰

Factors of 21212694720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 38988

Divisors of 21212694720

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 32 35 36 40 42 45 48 54 56 60 63 64 70 72 80 81 84 90 96 105 108 112 120 126 135 140 144 160 162 168 180 189 192 210 216 224 240 243 252 270 280 288 315 320 324 336 360 378 405 420 432 448 480 486 504 540 560 567 576 630 648 672 720 756 810 840 864 945 960 972 1008 1080 1120 1134 1215 1260 1296 1344 1440 1512 1620 1680 1701 1728 1890 1944 2016 2160 2240 2268 2430 2520 2592 2835 2880 3024 3240 3360 3402 3780 3888 4032 4320 4536 4860 5040 5184 5670 6048 6480 6720 6804 7560 7776 8505 8640 9072 9720 10080 11340 12096 12960 13608 15120 15552 17010 18144 19440 20160 22680 25920 27216 30240 34020 36288 38880 38971 45360 54432 60480 68040 77760 77942 90720 108864 116913 136080 155884 181440 194855 233826 272160 272797 311768 350739 389710 467652 544320 545594 584565 623536 701478 779420 818391 935304 1052217 1091188 1169130 1247072 1363985 1402956 1558840 1636782 1753695 1870608 2104434 2182376 2338260 2455173 2494144 2727970 2805912 3117680 3156651 3273564 3507390 3741216 4091955 4208868 4364752 4676520 4910346 5261085 5455940 5611824 6235360 6313302 6547128 7014780 7365519 7482432 8183910 8417736 8729504 9353040 9469953 9820692 10522170 10911880 11223648 12275865 12470720 12626604 13094256 14029560 14731038 15783255 16367820 16835472 17459008 18706080 18939906 19641384 21044340 21823760 22096557 22447296 24551730 25253208 26188512 28059120 29462076 31566510 32735640 33670944 36827595 37412160 37879812 39282768 42088680 43647520 44193114 47349765 49103460 50506416 52377024 56118240 58924152 63133020 65471280 66289671 67341888 73655190 75759624 78565536 84177360 87295040 88386228 94699530 98206920 101012832 110482785 112236480 117848304 126266040 130942560 132579342 147310380 151519248 157131072 168354720 176772456 189399060 196413840 202025664 220965570 235696608 252532080 261885120 265158684 294620760 303038496 331448355 336709440 353544912 378798120 392827680 441931140 471393216 505064160 530317368 589241520 606076992 662896710 707089824 757596240 785655360 883862280 1010128320 1060634736 1178483040 1325793420 1414179648 1515192480 1767724560 2121269472 2356966080 2651586840 3030384960 3535449120 4242538944 5303173680 7070898240 10606347360 21212694720
• Sum of all divisors σ(n): 86476685568
• Sum of proper divisors (its aliquot sum) s(n): 65263990848
• 21212694720 is an abundant number, because the sum of its proper divisors (65263990848) is greater than itself. Its abundance is 44051296128

Bases of 21212694720

• Binary: 10011110000011000000000100011000000₂
• Hexadecimal: 0x4F06008C0
• Base-36: 9QTHO00

Squares and roots of 21212694720

• 21212694720 squared (21212694720²) is 449978417283915878400
• 21212694720 cubed (21212694720³) is 9545254796432479094659842048000
• The square root of 21212694720 is 145645.7851089417
• The cube root of 21212694720 is 2768.2073279611

Scales and comparisons

• 21,212,694,720 seconds is equal to 674 years, 25 weeks, 6 days, 7 hours, 12 minutes.
• To count from 1 to 21,212,694,720 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 21212694720 cubic inches would be around 230.7 feet tall.

Recreational maths with 21212694720

• 21212694720 backwards is 02749621212
• 21212694720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21212694720's digits is 36
• More coming soon!