21001557704925728

Names of 21001557704925728

• Cardinal: 21001557704925728 can be written as Twenty-one quadrillion, one trillion, five hundred fifty-seven billion, seven hundred four million, nine hundred twenty-five thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1001557704925728 × 10¹⁶

Factors of 21001557704925728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 3959

Divisors of 21001557704925728

• Number of divisors d(n): 378
• Complete list of divisors:
  1 2 4 7 8 14 16 19 28 32 38 49 56 76 98 112 133 152 196 224 266 304 343 361 392 532 608 686 722 784 931 1064 1372 1444 1568 1862 2128 2401 2527 2744 2888 3724 3931 4256 4802 5054 5488 5776 6517 7448 7862 9604 10108 10976 11552 13034 14896 15724 16807 17689 19208 20216 26068 27517 29792 31448 33614 35378 38416 40432 45619 52136 55034 62896 67228 70756 74689 76832 80864 91238 104272 110068 117649 123823 125792 134456 141512 149378 182476 192619 208544 220136 235298 247646 268912 283024 298756 319333 364952 385238 440272 470596 495292 522823 537824 566048 597512 638666 729904 770476 866761 880544 941192 990584 1045646 1195024 1277332 1348333 1419091 1459808 1540952 1733522 1882384 1981168 2091292 2235331 2390048 2554664 2696666 2838182 3081904 3467044 3659761 3764768 3962336 4182584 4470662 5109328 5393332 5676364 6067327 6163808 6934088 7319522 8365168 8941324 9438331 9933637 10218656 10786664 11352728 12134654 13868176 14639044 15452761 16730336 17882648 18876662 19867274 21573328 22705456 24269308 25618327 27736352 29278088 30905522 35765296 37753324 39734548 42471289 43146656 45410912 48538616 51236654 58556176 61811044 66068317 69535459 71530592 75506648 79469096 84942578 97077232 102473308 108169327 117112352 123622088 132136634 139070918 151013296 158938192 169885156 179328289 194154464 204946616 216338654 247244176 264273268 278141836 293602459 302026592 317876384 339770312 358656578 409893232 432677308 462478219 486748213 494488352 528546536 556283672 587204918 679540624 717313156 757185289 819786464 865354616 924956438 973496426 1057093072 1112567344 1174409836 1255298023 1359081248 1434626312 1514370578 1730709232 1849912876 1946992852 2055217213 2114186144 2225134688 2348819672 2510596046 2869252624 3028741156 3407237491 3461418464 3699825752 3893985704 4110434426 4697639344 5021192092 5300297023 5578446721 5738505248 6057482312 6814474982 7399651504 7787971408 8220868852 8787086161 9395278688 10042384184 10600594046 11156893442 12114964624 13628949964 14386520491 14799303008 15575942816 16441737704 17574172322 20084768368 21201188092 22313786884 23850662437 24229929248 27257899928 28773040982 32883475408 35148344644 37102079161 39049127047 40169536736 42402376184 44627573768 47701324874 54515799856 57546081964 65766950816 70296689288 74204158322 78098254094 84804752368 89255147536 95402649748 100705643437 109031599712 115092163928 140593378576 148408316644 156196508188 166954637059 169609504736 178510295072 190805299496 201411286874 230184327856 259714554127 273343889329 281186757152 296816633288 312393016376 333909274118 381610598992 402822573748 460368655712 519429108254 546687778658 593633266576 624786032752 667818548236 704939504059 763221197984 805645147496 1038858216508 1093375557316 1187266533152 1249572065504 1335637096472 1409879008118 1611290294992 1818001878889 1913407225303 2077716433016 2186751114632 2671274192944 2819758016236 3222580589984 3636003757778 3826814450606 4155432866032 4373502229264 4934576528413 5342548385888 5639516032472 7272007515556 7653628901212 8310865732064 8747004458528 9869153056826 11279032064944 13393850577121 14544015031112 15307257802424 19738306113652 22558064129888 26787701154242 29088030062224 30614515604848 34542035698891 39476612227304 53575402308484 58176060124448 61229031209696 69084071397782 78953224454608 93756954039847 107150804616968 138168142795564 157906448909216 187513908079694 214301609233936 276336285591128 375027816159388 428603218467872 552672571182256 656298678278929 750055632318776 1105345142364512 1312597356557858 1500111264637552 2625194713115716 3000222529275104 5250389426231432 10500778852462864 21001557704925728
• Sum of all divisors σ(n): 50923308084357303
• Sum of proper divisors (its aliquot sum) s(n): 29921750379431575
• 21001557704925728 is an abundant number, because the sum of its proper divisors (29921750379431575) is greater than itself. Its abundance is 8920192674505847

Bases of 21001557704925728

• Binary: 1001010100111001100111000110010101110110110001000100000₂
• Hexadecimal: 0x4A9CCE32BB6220
• Base-36: 5QSFIF1D0RK

Squares and roots of 21001557704925728

• 21001557704925728 squared (21001557704925728²) is 441065426033325211637273996329984
• 21001557704925728 cubed (21001557704925728³) is 9263060996486529873909200232701393583471299428352
• The square root of 21001557704925728 is 144919141.9548353797
• The cube root of 21001557704925728 is 275899.2390405307

Scales and comparisons

• 21,001,557,704,925,728 seconds is equal to 667,784,572 years, 48 weeks, 3 days, 18 hours, 2 minutes, 8 seconds.
• To count from 1 to 21,001,557,704,925,728 would take you about two billion, three million, three hundred fifty-three thousand, seven hundred eighteen 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 21001557704925728 cubic inches would be around 22991.6 feet tall.

Recreational maths with 21001557704925728

• 21001557704925728 backwards is 82752940775510012
• The number of decimal digits it has is: 17
• The sum of 21001557704925728's digits is 65
• More coming soon!