21387047220

Names of 21387047220

• Cardinal: 21387047220 can be written as Twenty-one billion, three hundred eighty-seven million, forty-seven thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.138704722 × 10¹⁰

Factors of 21387047220

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 948

Divisors of 21387047220

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 27 28 30 33 35 36 42 44 45 54 55 60 63 66 67 70 77 81 84 90 99 105 108 110 126 132 134 135 140 154 162 165 180 189 198 201 210 220 231 243 252 268 270 297 308 315 324 330 335 378 385 396 402 405 420 462 469 486 495 540 567 594 603 630 660 670 693 737 756 770 804 810 853 891 924 938 945 972 990 1005 1134 1155 1188 1206 1215 1260 1340 1386 1407 1474 1485 1540 1620 1701 1706 1782 1809 1876 1890 1980 2010 2079 2211 2268 2310 2345 2412 2430 2559 2673 2772 2814 2835 2948 2970 3015 3402 3412 3465 3564 3618 3685 3780 4020 4158 4221 4265 4422 4455 4620 4690 4860 5118 5159 5346 5427 5628 5670 5940 5971 6030 6237 6633 6804 6930 7035 7236 7370 7677 8316 8442 8505 8530 8844 8910 9045 9380 9383 10236 10318 10395 10692 10854 11055 11340 11942 12060 12474 12663 12795 13266 13365 13860 14070 14740 15354 15477 16281 16884 17010 17060 17820 17913 18090 18711 18766 19899 20636 20790 21105 21708 22110 23031 23884 24948 25326 25590 25795 26532 26730 27135 28140 28149 29855 30708 30954 31185 32562 33165 34020 35826 36180 37422 37532 37989 38385 39798 41580 42210 44220 46062 46431 46915 50652 51180 51590 53460 53739 54270 56298 57151 59697 59710 61908 62370 63315 65124 65681 66330 69093 71652 74844 75978 76770 77385 79596 81405 84420 84447 89565 92124 92862 93555 93830 99495 103180 107478 108540 112596 113967 114302 115155 119394 119420 124740 126630 131362 132660 138186 139293 140745 151956 153540 154770 161217 162810 168894 171453 179091 179130 185724 187110 187660 189945 197043 198990 207279 214956 227934 228604 230310 232155 238788 253260 253341 262724 268695 276372 278586 281490 285755 298485 309540 322434 325620 328405 337788 342906 345465 358182 358260 374220 379890 394086 397980 400057 414558 417879 422235 455868 460620 464310 483651 506682 514359 537390 557172 562980 569835 571510 591129 596970 628661 644868 656810 685812 690930 696465 716364 759780 760023 788172 800114 806085 829116 835758 844470 857265 895455 928620 967302 985215 1013364 1028718 1036395 1074780 1139670 1143020 1182258 1193940 1200171 1253637 1257322 1266705 1313620 1381860 1392930 1450953 1520046 1543077 1600228 1612170 1671516 1688940 1714530 1773387 1790910 1885983 1934604 1970430 2000285 2057436 2072790 2089395 2279340 2280069 2364516 2400342 2418255 2507274 2514644 2533410 2571795 2785860 2901906 2955645 3040092 3086154 3143305 3224340 3429060 3546774 3581820 3600513 3771966 3800115 3940860 4000570 4145580 4178790 4400627 4560138 4629231 4800684 4836510 5014548 5066820 5143590 5320161 5657949 5803812 5911290 6000855 6172308 6268185 6286610 7093548 7201026 7254765 7543932 7600230 7715385 8001140 8357580 8801254 8866935 9120276 9258462 9429915 9673020 10287180 10640322 10801539 11315898 11400345 11822580 12001710 12536370 12573220 13201881 13887693 14402052 14509530 15200460 15430770 15960483 16973847 17602508 17733870 18002565 18516924 18859830 21280644 21603078 22003135 22631796 22800690 23146155 24003420 25072740 26403762 26600805 27775386 28289745 29019060 30861540 31920966 32404617 33947694 35467740 36005130 37719660 39605643 43206156 44006270 45601380 46292310 50921541 52807524 53201610 54007695 55550772 56579490 63841932 64809234 66009405 67895388 69438465 72010260 79211286 79802415 84869235 88012540 92584620 97213851 101843082 106403220 108015390 113158980 118816929 129618468 132018810 138876930 152764623 158422572 159604830 162023085 169738470 194427702 198028215 203686164 216030780 237633858 254607705 264037620 277753860 305529246 319209660 324046170 339476940 356450787 388855404 396056430 475267716 486069255 509215410 594084645 611058492 648092340 712901574 763823115 792112860 972138510 1018430820 1069352361 1188169290 1425803148 1527646230 1782253935 1944277020 2138704722 2376338580 3055292460 3564507870 4277409444 5346761805 7129015740 10693523610 21387047220
• Sum of all divisors σ(n): 85229254656
• Sum of proper divisors (its aliquot sum) s(n): 63842207436
• 21387047220 is an abundant number, because the sum of its proper divisors (63842207436) is greater than itself. Its abundance is 42455160216

Bases of 21387047220

• Binary: 10011111010110001000111000100110100₂
• Hexadecimal: 0x4FAC47134
• Base-36: 9TPAN90

Squares and roots of 21387047220

• 21387047220 squared (21387047220²) is 457405788790509728400
• 21387047220 cubed (21387047220³) is 9782559203563978249160175048000
• The square root of 21387047220 is 146243.1099915479
• The cube root of 21387047220 is 2775.7708421003

Scales and comparisons

• 21,387,047,220 seconds is equal to 680 years, 2 weeks, 1 day, 6 hours, 27 minutes.
• To count from 1 to 21,387,047,220 would take you about one thousand, three hundred sixty 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 21387047220 cubic inches would be around 231.3 feet tall.

Recreational maths with 21387047220

• 21387047220 backwards is 02274078312
• 21387047220 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21387047220's digits is 36
• More coming soon!