18491987534629221

Names of 18491987534629221

• Cardinal: 18491987534629221 can be written as Eighteen quadrillion, four hundred ninety-one trillion, nine hundred eighty-seven billion, five hundred thirty-four million, six hundred twenty-nine thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 1.8491987534629221 × 10¹⁶

Factors of 18491987534629221

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 9765647

Divisors of 18491987534629221

• Number of divisors d(n): 48
• Complete list of divisors:
  1 3 9 103 149 309 447 927 1341 13729 15347 41187 46041 123561 138123 1414087 2045621 4242261 6136863 9751663 12726783 18410589 29254989 87764967 210698963 632096889 1004421289 1452997787 1896290667 3013263867 4358993361 9039791601 13076980083 133880581327 149658772061 401641743981 448976316183 1204925231943 1346928948549 13789699876681 19948206617723 41369099630043 59844619853169 124107298890129 179533859559507 2054665281625469 6163995844876407 18491987534629221
• Sum of all divisors σ(n): 27152962314816000
• Sum of proper divisors (its aliquot sum) s(n): 8660974780186779
• 18491987534629221 is a deficient number, because the sum of its proper divisors (8660974780186779) is less than itself. Its deficiency is 9831012754442442

Bases of 18491987534629221

• Binary: 1000001101100100101110101011100001100010100100101100101₂
• Hexadecimal: 0x41B25D5C314965
• Base-36: 522V1SP5CV9

Squares and roots of 18491987534629221

• 18491987534629221 squared (18491987534629221²) is 341953602980882494932657947066841
• 18491987534629221 cubed (18491987534629221³) is 6323401763744028724634762790990077602871438760861
• The square root of 18491987534629221 is 135985247.4889435241
• The cube root of 18491987534629221 is 264440.4356739473

Scales and comparisons

• 18,491,987,534,629,221 seconds is equal to 587,988,004 years, 6 weeks, 4 days, 15 hours, 40 minutes, 21 seconds.
• To count from 1 to 18,491,987,534,629,221 would take you about one billion, seven hundred sixty-three million, nine hundred sixty-four thousand and twelve 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 18491987534629221 cubic inches would be around 22036.7 feet tall.

Recreational maths with 18491987534629221

• 18491987534629221 backwards is 12292643578919481
• The number of decimal digits it has is: 17
• The sum of 18491987534629221's digits is 81
• More coming soon!