21128729310

Names of 21128729310

• Cardinal: 21128729310 can be written as Twenty-one billion, one hundred twenty-eight million, seven hundred twenty-nine thousand, three hundred ten.

Scientific notation

• Scientific notation: 2.112872931 × 10¹⁰

Factors of 21128729310

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 224

Divisors of 21128729310

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 17 18 26 27 30 34 39 45 51 53 54 65 78 81 85 90 102 106 117 130 131 135 153 159 162 170 195 221 234 255 262 265 270 289 306 318 351 390 393 405 442 459 477 510 530 578 585 655 663 689 702 765 786 795 810 867 901 918 954 1053 1105 1170 1179 1310 1326 1377 1378 1431 1445 1530 1590 1703 1734 1755 1802 1965 1989 2067 2106 2210 2227 2295 2358 2385 2601 2703 2754 2862 2890 3315 3406 3445 3510 3537 3757 3930 3978 4134 4293 4335 4454 4505 4590 4770 5109 5202 5265 5406 5895 5967 6201 6630 6681 6885 6890 6943 7074 7155 7514 7803 8109 8515 8586 8670 9010 9945 10218 10335 10530 10611 11135 11271 11713 11790 11934 12402 13005 13362 13515 13770 13886 14310 15317 15327 15606 16218 17030 17685 17901 18603 18785 19890 20043 20670 20829 21222 21465 22270 22542 23409 23426 24327 25545 26010 27030 28951 29835 30634 30654 31005 33405 33813 34715 35139 35370 35802 37206 37570 37859 39015 40086 40545 41658 42930 45951 45981 46818 48654 51090 53055 55809 56355 57902 58565 59670 60129 62010 62487 66810 67626 69430 70278 72981 75718 76585 76635 78030 81090 86853 89505 90259 91902 91962 93015 100215 101439 104145 105417 106110 111618 112710 113577 117045 117130 118031 120258 121635 124974 137853 137943 144755 145962 153170 153270 169065 173706 175695 179010 180387 180518 186030 187461 189295 199121 200430 202878 208290 210834 227154 229755 229905 234090 236062 243270 260559 270777 275706 275886 279045 289510 300645 304317 312435 316251 338130 340731 351390 354093 360774 364905 374922 378590 398242 413559 434265 451295 459510 459810 492167 507195 521118 527085 541554 558090 562383 567885 590155 597363 601290 608634 624870 632502 681462 689265 689715 708186 729810 781677 812331 827118 868530 901935 902590 937305 948753 984334 995605 1014390 1022193 1054170 1062279 1124766 1135770 1180310 1194726 1240677 1302795 1353885 1378530 1379430 1476501 1521585 1534403 1563354 1581255 1624662 1703655 1770465 1792089 1803870 1874610 1897506 1991210 2006527 2044386 2067795 2124558 2345031 2436993 2460835 2481354 2605590 2707770 2811915 2953002 2986815 3043170 3066579 3068806 3162510 3186837 3407310 3540930 3584178 3908385 4013054 4061655 4135590 4429503 4603209 4690062 4743765 4873986 4921670 5110965 5311395 5376267 5623830 5973630 6019581 6133158 6203385 6373674 7310979 7382505 7672015 7816770 8123310 8859006 8960445 9206418 9487530 9560511 10032635 10221930 10622790 10752534 11725155 12039162 12184965 12406770 13288509 13809627 14621958 14765010 15332895 15344030 15934185 16128801 17920890 18058743 19121022 20065270 22147515 23016045 23450310 24369930 26084851 26577018 26881335 27619254 30097905 30665790 31868370 32257602 36117486 36554895 39865527 41428881 44295030 46032090 47802555 52169702 53762670 54176229 60195810 66442545 69048135 73109790 78254553 79731054 80644005 82857762 90293715 95605110 108352458 124286643 130424255 132885090 138096270 156509106 161288010 162528687 180587430 199327635 207144405 234763659 248573286 260848510 270881145 325057374 391272765 398655270 414288810 469527318 541762290 621433215 704290977 782545530 812643435 1173818295 1242866430 1408581954 1625286870 2112872931 2347636590 3521454885 4225745862 7042909770 10564364655 21128729310
• Sum of all divisors σ(n): 66725521632
• Sum of proper divisors (its aliquot sum) s(n): 45596792322
• 21128729310 is an abundant number, because the sum of its proper divisors (45596792322) is greater than itself. Its abundance is 24468063012

Bases of 21128729310

• Binary: 10011101011010111101101001011011110₂
• Hexadecimal: 0x4EB5ED2DE
• Base-36: 9PFHZVI

Squares and roots of 21128729310

• 21128729310 squared (21128729310²) is 446423202255253076100
• 21128729310 cubed (21128729310³) is 9432354998154623770461730491000
• The square root of 21128729310 is 145357.2471877477
• The cube root of 21128729310 is 2764.5500679993

Scales and comparisons

• 21,128,729,310 seconds is equal to 671 years, 43 weeks, 11 hours, 28 minutes, 30 seconds.
• To count from 1 to 21,128,729,310 would take you about one thousand, three hundred forty-three 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 21128729310 cubic inches would be around 230.4 feet tall.

Recreational maths with 21128729310

• 21128729310 backwards is 01392782112
• The number of decimal digits it has is: 11
• The sum of 21128729310's digits is 36
• More coming soon!