21004397820

Names of 21004397820

• Cardinal: 21004397820 can be written as Twenty-one billion, four million, three hundred ninety-seven thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.100439782 × 10¹⁰

Factors of 21004397820

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 960

Divisors of 21004397820

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 29 30 31 35 36 42 45 49 54 58 60 62 63 70 84 87 90 93 98 105 108 116 124 126 135 140 145 147 155 174 180 186 189 196 203 210 217 245 252 261 270 279 290 294 310 315 348 372 378 406 420 434 435 441 465 490 522 540 558 580 588 609 620 630 651 735 756 783 812 837 868 870 882 883 899 930 945 980 1015 1044 1085 1116 1218 1260 1302 1305 1323 1395 1421 1470 1519 1566 1674 1740 1764 1766 1798 1827 1860 1890 1953 2030 2170 2205 2436 2604 2610 2646 2649 2697 2790 2842 2940 3038 3045 3132 3255 3348 3532 3596 3654 3780 3906 3915 4060 4185 4263 4340 4410 4415 4495 4557 5220 5292 5298 5394 5481 5580 5684 5859 6076 6090 6181 6293 6510 6615 7105 7308 7595 7812 7830 7947 8091 8370 8526 8820 8830 8990 9114 9135 9765 10596 10788 10962 11718 12180 12362 12586 12789 13020 13230 13245 13485 13671 14210 15190 15660 15894 16182 16740 17052 17660 17980 18228 18270 18543 18879 19530 21315 21924 22785 23436 23841 24273 24724 25172 25578 25607 26460 26490 26970 27342 27373 27405 28420 29295 30380 30905 31465 31788 32364 36540 37086 37758 38367 39060 39735 40455 41013 42630 43267 44051 45570 47682 48546 51156 51214 52980 53940 54684 54746 54810 55629 56637 58590 61810 62930 63945 68355 74172 75516 76734 76821 79470 80910 82026 82119 85260 86534 88102 91140 92715 94395 95364 97092 102428 109492 109620 111258 113274 117180 119205 121365 123620 125860 127890 128035 129801 132153 136710 136865 153468 153642 158940 161820 164052 164238 166887 169911 173068 176204 179249 185430 188790 191611 191835 205065 216335 220255 222516 226548 230463 238410 242730 246357 255780 256070 259602 264306 273420 273730 278145 283185 307284 328476 333774 339822 358498 370860 377580 383222 383670 384105 389403 396459 410130 410595 432670 440510 460926 476820 485460 492714 512140 519204 528612 537747 547460 556290 566370 574833 649005 660765 667548 679644 691389 716996 739071 766444 767340 768210 778806 792918 793817 820260 821190 834435 849555 865340 881020 896245 921852 958055 985428 1075494 1112580 1132740 1149666 1152315 1168209 1189377 1231785 1254743 1298010 1321530 1341277 1382778 1478142 1536420 1557612 1585836 1587634 1613241 1642380 1668870 1699110 1724499 1792490 1916110 1947015 1982295 2150988 2299332 2304630 2336418 2378754 2381451 2463570 2509486 2596020 2643060 2682554 2688735 2765556 2874165 2956284 3175268 3226482 3337740 3398220 3448998 3456945 3584980 3695355 3764229 3832220 3894030 3964590 3969085 4023831 4609260 4672836 4757508 4762902 4839723 4927140 5018972 5173497 5365108 5377470 5556719 5748330 5841045 5946885 6273715 6452964 6706385 6897996 6913890 7144353 7390710 7528458 7788060 7929180 7938170 8047662 8066205 8622495 9525804 9679446 10346994 10754940 11113438 11292687 11496660 11682090 11893770 11907255 12071493 12547430 13412770 13827780 14288706 14781420 15056916 15876340 16095324 16132410 16670157 17244990 18821145 19358892 20119155 20693988 21433059 22226876 22585374 23364180 23787540 23814510 24142986 24198615 25094860 25867485 26825540 27783595 28577412 32264820 33340314 33878061 34489980 35721765 36214479 37642290 38897033 40238310 42866118 45170748 47629020 48285972 48397230 50010471 51734970 55567190 56463435 60357465 66680628 67756122 71443530 72428958 75284580 77794066 80476620 83350785 85732236 96794460 100020942 103469940 107165295 111134380 112926870 116691099 120714930 135512244 142887060 144857916 150031413 155588132 166701570 169390305 181072395 194485165 200041884 214330590 225853740 233382198 241429860 250052355 300062826 333403140 338780610 350073297 362144790 388970330 428661180 466764396 500104710 583455495 600125652 677561220 700146594 724289580 750157065 777940660 1000209420 1050219891 1166910990 1400293188 1500314130 1750366485 2100439782 2333821980 3000628260 3500732970 4200879564 5251099455 7001465940 10502198910 21004397820
• Sum of all divisors σ(n): 81265766400
• Sum of proper divisors (its aliquot sum) s(n): 60261368580
• 21004397820 is an abundant number, because the sum of its proper divisors (60261368580) is greater than itself. Its abundance is 39256970760

Bases of 21004397820

• Binary: 10011100011111101011010110011111100₂
• Hexadecimal: 0x4E3F5ACFC
• Base-36: 9NDH530

Squares and roots of 21004397820

• 21004397820 squared (21004397820²) is 441184727780820752400
• 21004397820 cubed (21004397820³) is 9266819534416764849521319768000
• The square root of 21004397820 is 144928.9405881379
• The cube root of 21004397820 is 2759.1167542389

Scales and comparisons

• 21,004,397,820 seconds is equal to 667 years, 45 weeks, 3 days, 10 hours, 57 minutes.
• To count from 1 to 21,004,397,820 would take you about one thousand, three hundred thirty-five 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 21004397820 cubic inches would be around 229.9 feet tall.

Recreational maths with 21004397820

• 21004397820 backwards is 02879340012
• 21004397820 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21004397820's digits is 36
• More coming soon!