21018205838343790

Names of 21018205838343790

• Cardinal: 21018205838343790 can be written as Twenty-one quadrillion, eighteen trillion, two hundred five billion, eight hundred thirty-eight million, three hundred forty-three thousand, seven hundred ninety.

Scientific notation

• Scientific notation: 2.101820583834379 × 10¹⁶

Factors of 21018205838343790

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 361

Divisors of 21018205838343790

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 5 10 23 46 115 230 331 529 662 1058 1655 2645 3310 5290 7613 15226 38065 76130 109561 175099 219122 350198 547805 875495 1095610 1750990 2519903 5039806 12599515 25199030 36264691 57957769 72529382 115915538 181323455 289788845 362646910 579577690 834087893 1668175786 4170439465 8340878930 12003612721 19184021539 24007225442 38368043078 60018063605 95920107695 120036127210 191840215390 276083092583 552166185166 1380415462915 2760830925830 3973195810651 6349911129409 7946391621302 12699822258818 19865979053255 31749555647045 39731958106510 63499111294090 91383503644973 182767007289946 456917518224865 913835036449730 2101820583834379 4203641167668758 10509102919171895 21018205838343790
• Sum of all divisors σ(n): 39669037132854024
• Sum of proper divisors (its aliquot sum) s(n): 18650831294510234
• 21018205838343790 is a deficient number, because the sum of its proper divisors (18650831294510234) is less than itself. Its deficiency is 2367374543833556

Bases of 21018205838343790

• Binary: 1001010101010111111001001100100110011110111111001101110₂
• Hexadecimal: 0x4AABF264CF7E6E
• Base-36: 5QYBYGQ5N5A

Squares and roots of 21018205838343790

• 21018205838343790 squared (21018205838343790²) is 441764976662988980214210231564100
• 21018205838343790 cubed (21018205838343790³) is 9285107211673843123794948961127741826725221939000
• The square root of 21018205838343790 is 144976569.9633695637
• The cube root of 21018205838343790 is 275972.1224308527

Scales and comparisons

• 21,018,205,838,343,790 seconds is equal to 668,313,932 years, 4 weeks, 1 day, 3 hours, 3 minutes, 10 seconds.
• To count from 1 to 21,018,205,838,343,790 would take you about two billion, four million, nine hundred forty-one thousand, seven hundred ninety-six 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 21018205838343790 cubic inches would be around 22997.7 feet tall.

Recreational maths with 21018205838343790

• 21018205838343790 backwards is 09734383850281012
• The number of decimal digits it has is: 17
• The sum of 21018205838343790's digits is 64
• More coming soon!