21518889840

Names of 21518889840

• Cardinal: 21518889840 can be written as Twenty-one billion, five hundred eighteen million, eight hundred eighty-nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.151888984 × 10¹⁰

Factors of 21518889840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 454

Divisors of 21518889840

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 35 36 40 42 45 47 48 54 56 60 63 70 72 80 84 90 94 105 107 108 112 120 126 135 140 141 144 168 180 188 189 210 214 216 235 240 252 270 280 282 283 315 321 329 336 360 376 378 420 423 428 432 470 504 535 540 560 564 566 630 642 658 705 720 749 752 756 840 846 849 856 940 945 963 987 1008 1070 1080 1128 1132 1260 1269 1284 1316 1410 1415 1498 1512 1605 1645 1680 1692 1698 1712 1880 1890 1926 1974 1981 2115 2140 2160 2247 2256 2264 2520 2538 2547 2568 2632 2820 2830 2889 2961 2996 3024 3210 3290 3384 3396 3745 3760 3780 3852 3948 3962 4230 4245 4280 4494 4528 4815 4935 5029 5040 5076 5094 5136 5264 5640 5660 5778 5922 5943 5992 6345 6420 6580 6741 6768 6792 7490 7560 7641 7704 7896 7924 8460 8490 8560 8883 8988 9630 9870 9905 10058 10152 10188 11235 11280 11320 11556 11844 11886 11984 12690 12735 12840 13160 13301 13482 13584 14445 14805 14980 15087 15120 15282 15408 15792 15848 16920 16980 17766 17829 17976 19260 19740 19810 20116 20223 20304 20376 22470 22640 23112 23688 23772 25145 25380 25470 25680 26320 26602 26964 28890 29610 29715 29960 30174 30281 30564 31696 33705 33840 33960 35203 35532 35658 35952 38205 38520 39480 39620 39903 40232 40446 40752 44415 44940 45261 46224 47376 47544 50290 50760 50940 53204 53487 53928 57780 59220 59430 59920 60348 60562 61128 66505 67410 67920 70406 71064 71316 75435 76410 77040 78960 79240 79806 80464 80892 88830 89145 89880 90522 90843 93107 95088 100580 101115 101520 101880 105609 106408 106974 107856 115560 118440 118860 119709 120696 121124 122256 133010 134820 135783 140812 142128 142632 150870 151405 152820 158480 159612 161784 176015 177660 178290 179760 181044 181686 186214 199515 201160 202230 203760 211218 211967 212816 213948 226305 231120 236880 237720 239418 241392 242248 266020 267435 269640 271566 272529 279321 281624 285264 301740 302810 305640 316827 319224 323568 352030 355320 356580 359127 362088 363372 372428 399030 402320 404460 422436 423934 427896 452610 454215 465535 475440 478836 484496 528045 532040 534870 539280 543132 545058 558642 563248 598545 603480 605620 611280 633654 635901 638448 678915 704060 710640 713160 718254 724176 726744 744856 798060 808920 817587 837963 844872 847868 855792 905220 908430 931070 950481 957672 1056090 1059835 1064080 1069740 1086264 1090116 1117284 1197090 1206960 1211240 1267308 1271802 1357830 1362645 1396605 1408120 1423207 1426320 1436508 1453488 1489712 1584135 1596120 1617840 1635174 1675926 1689744 1695736 1795635 1810440 1816860 1862140 1900962 1907703 1915344 2112180 2119670 2139480 2172528 2180232 2234568 2394180 2422480 2513889 2534616 2543604 2715660 2725290 2793210 2816240 2846414 2873016 3168270 3179505 3192240 3270348 3351852 3391472 3591270 3620880 3633720 3724280 3801924 3815406 4087935 4189815 4224360 4239340 4269621 4278960 4360464 4469136 4752405 4788360 5027778 5069232 5087208 5431320 5450580 5586420 5692828 5723109 5746032 6336540 6359010 6540696 6703704 7116035 7182540 7267440 7448560 7603848 7630812 8175870 8379630 8448720 8478680 8539242 9504810 9538515 9576720 9962449 10055556 10174416 10862640 10901160 11172840 11385656 11446218 12569445 12673080 12718020 12808863 13081392 13407408 14232070 14365080 15207696 15261624 16351740 16759260 16957360 17078484 19009620 19077030 19924898 20111112 21348105 21802320 22345680 22771312 22892436 25138890 25346160 25436040 25617726 28464140 28615545 28730160 29887347 30523248 32703480 33518520 34156968 38019240 38154060 38426589 39849796 40222224 42696210 45784872 49812245 50277780 50872080 51235452 56928280 57231090 59774694 64044315 65406960 67037040 68313936 76038480 76308120 76853178 79699592 85392420 89662041 91569744 99624490 100555560 102470904 113856560 114462180 119549388 128088630 149436735 152616240 153706356 159399184 170784840 179324082 192132945 199248980 201111120 204941808 228924360 239098776 256177260 268986123 298873470 307412712 341569680 358648164 384265890 398497960 448310205 457848720 478197552 512354520 537972246 597746940 614825424 717296328 768531780 796995920 896620410 1024709040 1075944492 1195493880 1344930615 1434592656 1537063560 1793240820 2151888984 2390987760 2689861230 3074127120 3586481640 4303777968 5379722460 7172963280 10759444920 21518889840
• Sum of all divisors σ(n): 87628677120
• Sum of proper divisors (its aliquot sum) s(n): 66109787280
• 21518889840 is an abundant number, because the sum of its proper divisors (66109787280) is greater than itself. Its abundance is 44590897440

Bases of 21518889840

• Binary: 10100000010101000000011001101110000₂
• Hexadecimal: 0x502A03370
• Base-36: 9VVSHO0

Squares and roots of 21518889840

• 21518889840 squared (21518889840²) is 463062619946055225600
• 21518889840 cubed (21518889840³) is 9964593507640949142242747904000
• The square root of 21518889840 is 146693.1826636807
• The cube root of 21518889840 is 2781.4630016627

Scales and comparisons

• 21,518,889,840 seconds is equal to 684 years, 12 weeks, 1 day, 5 hours, 24 minutes.
• To count from 1 to 21,518,889,840 would take you about one thousand, three hundred sixty-eight 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 21518889840 cubic inches would be around 231.8 feet tall.

Recreational maths with 21518889840

• 21518889840 backwards is 04898881512
• 21518889840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21518889840's digits is 54
• More coming soon!