21004893728

Names of 21004893728

• Cardinal: 21004893728 can be written as Twenty-one billion, four million, eight hundred ninety-three thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1004893728 × 10¹⁰

Factors of 21004893728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 423

Divisors of 21004893728

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 7 8 13 14 16 17 26 28 32 34 52 56 68 91 104 112 119 127 136 169 182 208 221 224 238 254 257 272 338 364 416 442 476 508 514 544 676 728 884 889 952 1016 1028 1183 1352 1456 1547 1651 1768 1778 1799 1904 2032 2056 2159 2366 2704 2873 2912 3094 3302 3341 3536 3556 3598 3808 4064 4112 4318 4369 4732 5408 5746 6188 6604 6682 7072 7112 7196 8224 8636 8738 9464 11492 11557 12376 13208 13364 14224 14392 15113 17272 17476 18928 20111 21463 22984 23114 23387 24752 26416 26728 28067 28448 28784 30226 30583 32639 34544 34952 37856 40222 42926 43433 45968 46228 46774 49504 52832 53456 56134 56797 57568 60452 61166 65278 69088 69904 80444 85852 86866 91936 92456 93548 106912 112268 113594 120904 122332 130556 139808 150241 160888 171704 173732 184912 187096 196469 224536 227188 228473 241808 244664 261112 300482 304031 321776 343408 347464 364871 369824 374192 392938 397579 424307 449072 454376 456946 483616 489328 522224 554863 600964 608062 643552 686816 694928 729742 738361 748384 785876 795158 848614 898144 908752 913892 978656 1044448 1109726 1201928 1216124 1389856 1459484 1476722 1571752 1590316 1697228 1817504 1827784 2219452 2403856 2432248 2554097 2918968 2953444 2970149 3143504 3180632 3394456 3655568 3884041 4438904 4807712 4864496 5108194 5168527 5515991 5837936 5906888 5940298 6287008 6361264 6788912 7213219 7311136 7768082 8877808 9728992 10216388 10337054 11031982 11675872 11813776 11880596 12722528 13577824 14426438 15536164 17755616 20432776 20674108 22063964 23627552 23761192 28852876 31072328 38611937 40865552 41348216 44127928 47522384 50492533 57705752 62144656 77223874 81731104 82696432 88255856 93771847 95044768 100985066 115411504 124289312 154447748 165392864 176511712 187543694 201970132 230823008 308895496 375087388 403940264 617790992 656402929 750174776 807880528 1235581984 1312805858 1500349552 1615761056 2625611716 3000699104 5251223432 10502446864 21004893728
• Sum of all divisors σ(n): 54825652224
• Sum of proper divisors (its aliquot sum) s(n): 33820758496
• 21004893728 is an abundant number, because the sum of its proper divisors (33820758496) is greater than itself. Its abundance is 12815864768

Bases of 21004893728

• Binary: 10011100011111111010011111000100000₂
• Hexadecimal: 0x4E3FD3E20
• Base-36: 9NDRRQ8

Squares and roots of 21004893728

• 21004893728 squared (21004893728²) is 441205560524573737984
• 21004893728 cubed (21004893728³) is 9267475911021343298853636964352
• The square root of 21004893728 is 144930.6514440613
• The cube root of 21004893728 is 2759.1384680615

Scales and comparisons

• 21,004,893,728 seconds is equal to 667 years, 46 weeks, 2 days, 4 hours, 42 minutes, 8 seconds.
• To count from 1 to 21,004,893,728 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 21004893728 cubic inches would be around 229.9 feet tall.

Recreational maths with 21004893728

• 21004893728 backwards is 82739840012
• The number of decimal digits it has is: 11
• The sum of 21004893728's digits is 44
• More coming soon!