21061358640

Names of 21061358640

• Cardinal: 21061358640 can be written as Twenty-one billion, sixty-one million, three hundred fifty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.106135864 × 10¹⁰

Factors of 21061358640

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 642

Divisors of 21061358640

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 19 20 21 24 27 28 30 35 36 38 40 42 45 48 54 56 57 60 63 70 72 76 80 84 90 95 105 108 112 114 120 126 133 135 140 144 152 167 168 171 180 189 190 210 216 228 240 252 266 270 280 285 304 315 334 336 342 360 378 380 399 420 432 439 456 501 504 513 532 540 560 570 630 665 668 684 720 756 760 798 835 840 855 878 912 945 1002 1008 1026 1064 1080 1140 1169 1197 1260 1317 1330 1336 1368 1503 1512 1520 1596 1670 1680 1710 1756 1890 1995 2004 2052 2128 2160 2195 2280 2338 2394 2505 2520 2565 2634 2660 2672 2736 3006 3024 3073 3173 3192 3340 3420 3507 3512 3591 3780 3951 3990 4008 4104 4390 4509 4560 4676 4788 5010 5040 5130 5268 5320 5845 5985 6012 6146 6346 6384 6585 6680 6840 7014 7024 7182 7515 7560 7902 7980 8016 8208 8341 8780 9018 9219 9352 9519 9576 10020 10260 10521 10536 10640 11690 11853 11970 12024 12292 12692 13170 13360 13680 14028 14364 15030 15120 15365 15804 15865 15960 16682 17535 17560 17955 18036 18438 18704 19038 19152 19755 20040 20520 21042 21072 22211 22545 23380 23706 23940 24048 24584 25023 25384 26340 27657 28056 28557 28728 30060 30730 31563 31608 31730 31920 33364 35070 35120 35910 36072 36876 38076 39510 40080 41040 41705 42084 44422 45090 46095 46760 47412 47595 47880 49168 50046 50768 52605 52680 55314 56112 57114 57456 58387 59265 60120 61460 63126 63216 63460 66633 66728 70140 71820 72144 73313 73752 75069 76152 79020 82971 83410 84168 85671 88844 90180 92190 93520 94824 95190 95760 100092 105210 105360 110628 111055 114228 116774 118530 120240 122920 125115 126252 126920 133266 133456 138285 140280 142785 143640 146626 147504 150138 152304 157815 158040 165942 166820 168336 171342 175161 177688 180360 184380 189648 190380 199899 200184 210420 219939 221256 222110 225207 228456 233548 237060 245840 250230 252504 253840 266532 276570 280560 285570 287280 291935 293252 300276 315630 316080 331884 333165 333640 342684 350322 355376 360720 366565 368760 375345 380760 399798 400368 414855 420840 428355 439878 442512 444220 450414 456912 467096 474120 500460 505008 513191 525483 533064 553140 571140 583870 586504 599697 600552 631260 659817 663768 666330 667280 685368 700644 733130 737520 750690 761520 799596 829710 841680 856710 875805 879756 888440 900828 934192 948240 999495 1000920 1026382 1050966 1066128 1099695 1106280 1126035 1142280 1167740 1173008 1199394 1201104 1262520 1319634 1327536 1332660 1370736 1392947 1401288 1466260 1501380 1539573 1576449 1599192 1659420 1713420 1751610 1759512 1776880 1801656 1979451 1998990 2001840 2052764 2101932 2199390 2212560 2252070 2284560 2335480 2398788 2525040 2565955 2627415 2639268 2665320 2785894 2802576 2932520 2998485 3002760 3079146 3152898 3198384 3299085 3318840 3426840 3503220 3519024 3603312 3958902 3997980 4105528 4178841 4203864 4398780 4504140 4618719 4670960 4797576 5131910 5254830 5278536 5330640 5571788 5865040 5996970 6005520 6158292 6305796 6598170 6637680 6853680 6964735 7006440 7697865 7882245 7917804 7995960 8211056 8357682 8407728 8797560 9008280 9237438 9595152 9750629 9897255 10263820 10509660 10557072 11143576 11993940 12316584 12536523 12611592 13196340 13856157 13929470 14012880 15395730 15764490 15835608 15991920 16715364 17595120 18016560 18474876 19501258 19794510 20527640 20894205 21019320 22287152 23093595 23987880 24633168 25073046 25223184 26392680 27712314 27858940 29251887 30791460 31528980 31671216 33430728 36949752 37609569 39002516 39589020 41055280 41788410 42038640 46187190 47975760 48753145 50146092 52785360 55424628 55717880 58503774 61582920 62682615 63057960 66861456 69280785 73899504 75219138 78005032 79178040 83576820 87755661 92374380 97506290 100292184 110849256 111435760 117007548 123165840 125365230 126115920 138561570 146259435 150438276 156010064 158356080 167153640 175511322 184748760 188047845 195012580 200584368 221698512 234015096 250730460 263266983 277123140 292518870 300876552 334307280 351022644 369497520 376095690 390025160 438778305 468030192 501460920 526533966 554246280 585037740 601753104 702045288 752191380 780050320 877556610 1002921840 1053067932 1108492560 1170075480 1316334915 1404090576 1504382760 1755113220 2106135864 2340150960 2632669830 3008765520 3510226440 4212271728 5265339660 7020452880 10530679320 21061358640
• Sum of all divisors σ(n): 87994368000
• Sum of proper divisors (its aliquot sum) s(n): 66933009360
• 21061358640 is an abundant number, because the sum of its proper divisors (66933009360) is greater than itself. Its abundance is 45871650720

Bases of 21061358640

• Binary: 10011100111010110101101010000110000₂
• Hexadecimal: 0x4E75AD430
• Base-36: 9OBE0C0

Squares and roots of 21061358640

• 21061358640 squared (21061358640²) is 443580827762702649600
• 21061358640 cubed (21061358640³) is 9342414899338349318903852544000
• The square root of 21061358640 is 145125.3204647625
• The cube root of 21061358640 is 2761.6086085877

Scales and comparisons

• 21,061,358,640 seconds is equal to 669 years, 35 weeks, 4 days, 17 hours, 24 minutes.
• To count from 1 to 21,061,358,640 would take you about one thousand, three hundred thirty-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 21061358640 cubic inches would be around 230.1 feet tall.

Recreational maths with 21061358640

• 21061358640 backwards is 04685316012
• 21061358640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21061358640's digits is 36
• More coming soon!