21278979871387220

Names of 21278979871387220

• Cardinal: 21278979871387220 can be written as Twenty-one quadrillion, two hundred seventy-eight trillion, nine hundred seventy-nine billion, eight hundred seventy-one million, three hundred eighty-seven thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.127897987138722 × 10¹⁶

Factors of 21278979871387220

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 837

Divisors of 21278979871387220

• Number of divisors d(n): 486
• Complete list of divisors:
  1 2 4 5 10 19 20 31 38 62 76 79 95 124 155 158 190 310 316 361 380 395 589 620 701 722 790 961 1178 1402 1444 1501 1580 1805 1922 2356 2449 2804 2945 3002 3505 3610 3844 4805 4898 5890 6004 6241 7010 7220 7505 9610 9796 11191 11780 12245 12482 13319 14020 15010 18259 19220 21731 22382 24490 24964 26638 28519 30020 31205 36518 43462 44764 46531 48980 53276 55379 55955 57038 62410 66595 73036 75919 86924 91295 93062 108655 110758 111910 114076 118579 124820 133190 142595 151838 182590 186124 193471 217310 221516 223820 232655 237158 253061 266380 276895 285190 303676 346921 365180 379595 386942 412889 434620 465310 474316 491401 506122 553790 570380 592895 673661 693842 759190 773884 825778 884089 930620 967355 982802 1012244 1052201 1107580 1185790 1265305 1347322 1387684 1442461 1518380 1651556 1716749 1734605 1768178 1934710 1965604 2064445 2104402 2253001 2371580 2457005 2530610 2694644 2884922 3368305 3433498 3469210 3536356 3675949 3869420 4128890 4208804 4374941 4420445 4506002 4914010 5061220 5261005 5769844 5997601 6736610 6866996 6938420 7212305 7351898 7844891 8257780 8583745 8749882 8840890 9012004 9336619 9828020 10522010 11265005 11995202 12799559 13473220 14424610 14703796 15233431 15689782 17167490 17499764 17681780 18379745 18673238 19991819 21044020 21874705 22530010 23990404 25599118 27406759 28849220 29988005 30466862 31379564 32618231 34334980 36759490 37346476 38820679 39224455 39983638 43749410 45060020 46683095 51198236 53219219 54813518 59976010 60933724 63997795 65236462 69843031 73518980 76167155 77641358 78448910 79967276 83123879 87498820 93366190 99959095 106438438 109627036 113954419 119952020 127995590 130472924 135623171 137033795 139686062 152334310 155282716 156897820 163091155 166247758 177395761 186732380 194103395 199918190 212876876 227908838 243191621 255991180 266096095 271246342 274067590 279372124 289435189 304668620 326182310 332495516 349215155 354791522 388206790 399836380 415619395 455817676 472236361 486383242 532192190 542492684 548135180 569772095 578870378 619746389 652364620 678115855 698430310 709583044 737592901 776413580 831238790 886978805 944472722 972766484 1011165161 1064384380 1139544190 1157740756 1203441049 1215958105 1239492778 1356231710 1396860620 1447175945 1475185802 1579353701 1662477580 1773957610 1888945444 2022330322 2165133961 2279088380 2361181805 2406882098 2431916210 2478985556 2576840249 2712463420 2894351890 2950371604 3066833641 3098731945 3158707402 3547915220 3687964505 4044660644 4204318301 4330267922 4722363610 4813764196 4863832420 5055825805 5153680498 5499268591 5788703780 6017205245 6133667282 6197463890 6317414804 7375929010 7896768505 8408636602 8660535844 8972490859 9444727220 10111651610 10307360996 10825669805 10998537182 12034410490 12267334564 12394927780 12884201245 14014265119 14751858020 15334168205 15793537010 16817273204 17944981718 19212138059 20223303220 21021591505 21651339610 21997074364 22865379931 24068820980 25768402490 27496342955 28028530238 30668336410 31587074020 35889963436 37306672519 38424276118 42043183010 43302679220 44862454295 45730759862 48959964731 51536804980 54992685910 56057060476 58269839179 61336672820 70071325595 74613345038 76848552236 79882047719 84086366020 89724908590 91461519724 95071842871 96060690295 97919929462 109985371820 114326899655 116539678358 140142651190 149226690076 159764095438 170477326321 179449817180 186533362595 190143685742 192121380590 195839858924 228653799310 233079356716 244799823655 280285302380 291349195895 319528190876 340954652642 373066725190 380287371484 384242761180 399410238595 434442218689 457307598620 475359214355 489599647310 582698391790 681909305284 708826777861 746133450380 798820477190 852386631605 868884437378 950718428710 979199294620 1107126944401 1165396783580 1417653555722 1517758906661 1597640954380 1704773263210 1737768874756 1806365014549 1901436857420 2172211093445 2214253888802 2835307111444 2947227129001 3035517813322 3409546526420 3544133889305 3612730029098 4344422186890 4428507777604 5535634722005 5894454258002 6071035626644 7088267778610 7225460058196 7588794533305 8688844373780 9031825072745 11071269444010 11788908516004 13467708779359 14176535557220 14736135645005 15177589066610 18063650145490 22142538888020 26935417558718 29472271290010 30355178133220 34320935276431 36127300290980 53870835117436 55997315451019 58944542580020 67338543896795 68641870552862 111994630902038 134677087793590 137283741105724 171604676382155 223989261804076 269354175587180 279986577255095 343209352764310 559973154510190 686418705528620 1063948993569361 1119946309020380 2127897987138722 4255795974277444 5319744967846805 10639489935693610 21278979871387220
• Sum of all divisors σ(n): 49427121322907118
• Sum of proper divisors (its aliquot sum) s(n): 28148141451519898
• 21278979871387220 is an abundant number, because the sum of its proper divisors (28148141451519898) is greater than itself. Its abundance is 6869161580132678

Bases of 21278979871387220

• Binary: 1001011100110010001111010010100011010101010111001010100₂
• Hexadecimal: 0x4B991E946AAE54
• Base-36: 5TIROEGG0GK

Squares and roots of 21278979871387220

• 21278979871387220 squared (21278979871387220²) is 452794984366902469812447179328400
• 21278979871387220 cubed (21278979871387220³) is 9635015358208408607605800648540526695415943048000
• The square root of 21278979871387220 is 145873163.6435818855
• The cube root of 21278979871387220 is 277108.7682576635

Scales and comparisons

• 21,278,979,871,387,220 seconds is equal to 676,605,739 years, 36 weeks, 4 days, 4 hours, 20 seconds.
• To count from 1 to 21,278,979,871,387,220 would take you about two billion, twenty-nine million, eight hundred seventeen thousand, two hundred nineteen 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 21278979871387220 cubic inches would be around 23092.4 feet tall.

Recreational maths with 21278979871387220

• 21278979871387220 backwards is 02278317897987212
• The number of decimal digits it has is: 17
• The sum of 21278979871387220's digits is 83
• More coming soon!