21384140778

Names of 21384140778

• Cardinal: 21384140778 can be written as Twenty-one billion, three hundred eighty-four million, one hundred forty thousand, seven hundred seventy-eight.

Scientific notation

• Scientific notation: 2.1384140778 × 10¹⁰

Factors of 21384140778

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 7810

Divisors of 21384140778

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 6 7 9 11 13 14 17 18 21 22 26 27 33 34 39 42 51 54 63 66 77 78 81 91 99 102 117 119 126 143 153 154 162 182 187 189 198 221 231 234 238 273 286 297 306 351 357 374 378 429 442 459 462 546 561 567 594 663 693 702 714 819 858 891 918 1001 1053 1071 1122 1134 1287 1309 1326 1377 1386 1547 1638 1683 1782 1989 2002 2079 2106 2142 2431 2457 2574 2618 2754 3003 3094 3213 3366 3861 3927 3978 4158 4641 4862 4914 5049 5967 6006 6237 6426 7293 7371 7722 7757 7854 9009 9282 9639 10098 11583 11781 11934 12474 13923 14586 14742 15147 15514 17017 17901 18018 19278 21879 23166 23271 23562 27027 27846 30294 34034 35343 35802 41769 43758 46542 51051 54054 54299 65637 69813 70686 81081 83538 85327 100841 102102 106029 108598 125307 131274 131869 139626 153153 162162 162897 170654 196911 201682 209439 212058 250614 255981 263738 302523 306306 325794 393822 395607 418878 459459 488691 511962 597289 605046 628317 705887 767943 791214 907569 918918 923083 977382 1109251 1186821 1194578 1256634 1378377 1411774 1450559 1466073 1535886 1714297 1791867 1815138 1846166 2117661 2218502 2303829 2373642 2722707 2756754 2769249 2901118 2932146 3327753 3428594 3560463 3583734 4235322 4351677 4398219 4607658 5142891 5375601 5445414 5538498 6352983 6655506 6911487 7120926 7764757 8168121 8307747 8703354 8796438 9983259 10153913 10285782 10681389 10751202 12000079 12705966 13055031 13822974 15428673 15529514 16126803 16336242 16615494 18857267 19058949 19966518 20307826 21362778 23294271 24000158 24923241 26110062 29949777 30461739 30857346 32253606 36000237 37714534 38117898 39165093 46286019 46588542 48380409 49846482 56571801 57176847 59899554 60923478 69882813 72000474 74769723 78330186 89849331 91385217 92572038 96760818 108000711 113143602 114353694 117495279 132000869 138858057 139765626 149539446 169715403 179698662 182770434 209648439 216001422 234990558 264001738 274155651 277716114 324002133 339430806 396002607 419296878 509146209 548311302 628945317 648004266 792005214 822466953 972006399 1018292418 1188007821 1257890634 1527438627 1644933906 1944012798 2376015642 3054877254 3564023463 7128046926 10692070389 21384140778
• Sum of all divisors σ(n): 68128397568
• Sum of proper divisors (its aliquot sum) s(n): 46744256790
• 21384140778 is an abundant number, because the sum of its proper divisors (46744256790) is greater than itself. Its abundance is 25360116012

Bases of 21384140778

• Binary: 10011111010100110000001011111101010₂
• Hexadecimal: 0x4FA9817EA
• Base-36: 9TNKCMI

Squares and roots of 21384140778

• 21384140778 squared (21384140778²) is 457281476813322445284
• 21384140778 cubed (21384140778³) is 9778571475347829995860258190952
• The square root of 21384140778 is 146233.1726319305
• The cube root of 21384140778 is 2775.6450964819

Scales and comparisons

• 21,384,140,778 seconds is equal to 679 years, 49 weeks, 2 days, 15 hours, 6 minutes, 18 seconds.
• To count from 1 to 21,384,140,778 would take you about one thousand, three hundred fifty-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 21384140778 cubic inches would be around 231.3 feet tall.

Recreational maths with 21384140778

• 21384140778 backwards is 87704148312
• The number of decimal digits it has is: 11
• The sum of 21384140778's digits is 45
• More coming soon!