21816262728

Names of 21816262728

• Cardinal: 21816262728 can be written as Twenty-one billion, eight hundred sixteen million, two hundred sixty-two thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1816262728 × 10¹⁰

Factors of 21816262728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 121

Divisors of 21816262728

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 18 24 26 36 39 52 72 78 103 104 117 156 169 206 234 309 312 338 412 468 507 618 676 824 927 936 1014 1236 1339 1352 1521 1854 2028 2197 2472 2678 3042 3708 4017 4056 4394 5356 6084 6591 7416 8034 8788 10609 10712 12051 12168 13182 16068 17407 17576 19773 21218 24102 26364 28561 31827 32136 34814 39546 42436 48204 52221 52728 57122 63654 69628 79092 84872 85683 95481 96408 104442 114244 127308 137917 139256 156663 158184 171366 190962 208884 226291 228488 254616 257049 275834 313326 342732 381924 413751 417768 452582 514098 551668 626652 678873 685464 763848 827502 905164 1028196 1103336 1241253 1253304 1357746 1655004 1792921 1810328 2036619 2056392 2482506 2715492 2941783 3310008 3585842 4073238 4965012 5378763 5430984 5883566 7171684 8146476 8825349 9930024 10757526 11767132 14343368 16136289 16292952 17650698 21515052 23307973 23534264 26476047 32272578 35301396 43030104 46615946 52952094 64545156 69923919 70602792 93231892 105904188 129090312 139847838 186463784 209771757 211808376 279695676 303003649 419543514 559391352 606007298 839087028 909010947 1212014596 1678174056 1818021894 2424029192 2727032841 3636043788 5454065682 7272087576 10908131364 21816262728
• Sum of all divisors σ(n): 64636831935
• Sum of proper divisors (its aliquot sum) s(n): 42820569207
• 21816262728 is an abundant number, because the sum of its proper divisors (42820569207) is greater than itself. Its abundance is 21004306479

Bases of 21816262728

• Binary: 10100010100010110011100000001001000₂
• Hexadecimal: 0x51459C048
• Base-36: A0SU820

Squares and roots of 21816262728

• 21816262728 squared (21816262728²) is 475949319417122001984
• 21816262728 cubed (21816262728³) is 10383435397616725416912281252352
• The square root of 21816262728 is 147703.2928813707
• The cube root of 21816262728 is 2794.2169214211

Scales and comparisons

• 21,816,262,728 seconds is equal to 693 years, 35 weeks, 6 days, 58 minutes, 48 seconds.
• To count from 1 to 21,816,262,728 would take you about one thousand, three hundred eighty-seven 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 21816262728 cubic inches would be around 232.9 feet tall.

Recreational maths with 21816262728

• 21816262728 backwards is 82726261812
• The number of decimal digits it has is: 11
• The sum of 21816262728's digits is 45
• More coming soon!