21378812671680

Names of 21378812671680

• Cardinal: 21378812671680 can be written as Twenty-one trillion, three hundred seventy-eight billion, eight hundred twelve million, six hundred seventy-one thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.137881267168 × 10¹³

Factors of 21378812671680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4621357

Divisors of 21378812671680

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 61 64 79 80 96 120 122 158 160 183 192 237 240 244 305 316 320 366 395 474 480 488 610 632 732 790 915 948 960 976 1185 1220 1264 1464 1580 1830 1896 1952 2370 2440 2528 2928 3160 3660 3792 3904 4740 4819 4880 5056 5856 6320 7320 7584 9480 9638 9760 11712 12640 14457 14640 15168 18960 19276 19520 24095 25280 28914 29280 37920 38552 48190 57828 58560 72285 75840 77104 96380 115656 144570 154208 192760 231312 289140 308416 385520 462624 578280 771040 925248 1156560 1542080 2313120 4621207 4626240 9242414 13863621 18484828 23106035 27727242 36969656 46212070 55454484 69318105 73939312 92424140 110908968 138636210 147878624 184848280 221817936 277272420 281893627 295757248 365075353 369696560 443635872 554544840 563787254 730150706 739393120 845680881 887271744 1095226059 1109089680 1127574508 1409468135 1460301412 1478786240 1691361762 1825376765 2190452118 2218179360 2255149016 2818936270 2920602824 3382723524 3650753530 4228404405 4380904236 4436358720 4510298032 5476130295 5637872540 5841205648 6765447048 7301507060 8456808810 8761808472 9020596064 10952260590 11275745080 11682411296 13530894096 14603014120 16913617620 17523616944 18041192128 21904521180 22269596533 22551490160 23364822592 27061788192 29206028240 33827235240 35047233888 43809042360 44539193066 45102980320 54123576384 58412056480 66808789599 67654470480 70094467776 87618084720 89078386132 90205960640 111347982665 116824112960 133617579198 135308940960 175236169440 178156772264 222695965330 267235158396 270617881920 334043947995 350472338880 356313544528 445391930660 534470316792 668087895990 712627089056 890783861320 1068940633584 1336175791980 1425254178112 1781567722640 2137881267168 2672351583960 3563135445280 4275762534336 5344703167920 7126270890560 10689406335840 21378812671680
• Sum of all divisors σ(n): 69863792240640
• Sum of proper divisors (its aliquot sum) s(n): 48484979568960
• 21378812671680 is an abundant number, because the sum of its proper divisors (48484979568960) is greater than itself. Its abundance is 27106166897280

Bases of 21378812671680

• Binary: 100110111000110100100100010001111011011000000₂
• Hexadecimal: 0x1371A488F6C0
• Base-36: 7KTAH2VUO

Squares and roots of 21378812671680

• 21378812671680 squared (21378812671680²) is 457053631250785339474022400
• 21378812671680 cubed (21378812671680³) is 9771263963421647663498800591300165632000
• The square root of 21378812671680 is 4623722.8151869139
• The cube root of 21378812671680 is 27754.1454929301

Scales and comparisons

• 21,378,812,671,680 seconds is equal to 679,780 years, 5 weeks, 6 days, 11 hours, 28 minutes.
• To count from 1 to 21,378,812,671,680 would take you about one million, six hundred ninety-nine thousand, four hundred fifty 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 21378812671680 cubic inches would be around 2312.8 feet tall.

Recreational maths with 21378812671680

• 21378812671680 backwards is 08617621887312
• 21378812671680 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21378812671680's digits is 60
• More coming soon!