21538914140

Names of 21538914140

• Cardinal: 21538914140 can be written as Twenty-one billion, five hundred thirty-eight million, nine hundred fourteen thousand, one hundred forty.

Scientific notation

• Scientific notation: 2.153891414 × 10¹⁰

Factors of 21538914140

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 5041

Divisors of 21538914140

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 10 19 20 38 43 76 86 95 172 190 215 281 380 430 562 817 860 1124 1405 1634 2810 3268 4085 4691 5339 5620 8170 9382 10678 12083 16340 18764 21356 23455 24166 26695 46910 48332 53390 60415 89129 93820 106780 120830 178258 201713 229577 241660 356516 403426 445645 459154 806852 891290 918308 1008565 1147885 1318171 1782580 2017130 2295770 2636342 3832547 4034260 4591540 5272684 6590855 7665094 13181710 15330188 19162735 25045249 26363420 38325470 50090498 56681353 76650940 100180996 113362706 125226245 226725412 250452490 283406765 500904980 566813530 1076945707 1133627060 2153891414 4307782828 5384728535 10769457070 21538914140
• Sum of all divisors σ(n): 48903402240
• Sum of proper divisors (its aliquot sum) s(n): 27364488100
• 21538914140 is an abundant number, because the sum of its proper divisors (27364488100) is greater than itself. Its abundance is 5825573960

Bases of 21538914140

• Binary: 10100000011110100011011111101011100₂
• Hexadecimal: 0x503D1BF5C
• Base-36: 9W7POIK

Squares and roots of 21538914140

• 21538914140 squared (21538914140²) is 463924822330291939600
• 21538914140 cubed (21538914140³) is 9992436915586912808178465944000
• The square root of 21538914140 is 146761.4191127899
• The cube root of 21538914140 is 2782.3254932191

Scales and comparisons

• 21,538,914,140 seconds is equal to 684 years, 45 weeks, 1 day, 23 hours, 42 minutes, 20 seconds.
• To count from 1 to 21,538,914,140 would take you about one thousand, three hundred sixty-nine 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 21538914140 cubic inches would be around 231.9 feet tall.

Recreational maths with 21538914140

• 21538914140 backwards is 04141983512
• 21538914140 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21538914140's digits is 38
• More coming soon!