21991955384

Names of 21991955384

• Cardinal: 21991955384 can be written as Twenty-one billion, nine hundred ninety-one million, nine hundred fifty-five thousand, three hundred eighty-four.

Scientific notation

• Scientific notation: 2.1991955384 × 10¹⁰

Factors of 21991955384

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 177

Divisors of 21991955384

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 7 8 14 19 28 38 49 56 76 98 133 149 152 196 266 298 343 361 392 532 596 686 722 931 1043 1064 1192 1372 1444 1862 2086 2527 2744 2831 2888 3724 4172 5054 5662 6517 7301 7448 8344 10108 11324 13034 14602 17689 19817 20216 22201 22648 26068 29204 35378 39634 44402 51107 52136 53789 58408 70756 79268 88804 102214 107578 123823 138719 141512 155407 158536 177608 204428 215156 247646 277438 310814 376523 408856 421819 430312 495292 554876 621628 753046 843638 971033 990584 1087849 1109752 1243256 1506092 1687276 1942066 2175698 2635661 2952733 3012184 3374552 3884132 4351396 5271322 5905466 7614943 7768264 8014561 8702792 10542644 11810932 15229886 16029122 18449627 20669131 21085288 23621864 30459772 32058244 36899254 41338262 56101927 60919544 64116488 73798508 82676524 112203854 144683917 147597016 165353048 224407708 289367834 392713489 448815416 578735668 785426978 1157471336 1570853956 2748994423 3141707912 5497988846 10995977692 21991955384
• Sum of all divisors σ(n): 51094386000
• Sum of proper divisors (its aliquot sum) s(n): 29102430616
• 21991955384 is an abundant number, because the sum of its proper divisors (29102430616) is greater than itself. Its abundance is 7110475232

Bases of 21991955384

• Binary: 10100011110110100101001101110111000₂
• Hexadecimal: 0x51ED29BB8
• Base-36: A3PFXDK

Squares and roots of 21991955384

• 21991955384 squared (21991955384²) is 483646101611846587456
• 21991955384 cubed (21991955384³) is 10636323488293260637185006063104
• The square root of 21991955384 is 148296.8488673983
• The cube root of 21991955384 is 2801.6977537081

Scales and comparisons

• 21,991,955,384 seconds is equal to 699 years, 14 weeks, 2 days, 12 hours, 29 minutes, 44 seconds.
• To count from 1 to 21,991,955,384 would take you about one thousand, three hundred ninety-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 21991955384 cubic inches would be around 233.5 feet tall.

Recreational maths with 21991955384

• 21991955384 backwards is 48355919912
• 21991955384 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21991955384's digits is 56
• More coming soon!