21530340

Names of 21530340

• Cardinal: 21530340 can be written as Twenty-one million, five hundred thirty thousand, three hundred forty.

Scientific notation

• Scientific notation: 2.153034 × 10⁷

Factors of 21530340

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3090

Divisors of 21530340

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 90 108 117 130 135 156 180 195 234 260 270 351 390 468 540 585 702 780 1170 1404 1755 2340 3067 3510 6134 7020 9201 12268 15335 18402 27603 30670 36804 39871 46005 55206 61340 79742 82809 92010 110412 119613 138015 159484 165618 184020 199355 239226 276030 331236 358839 398710 414045 478452 552060 598065 717678 797420 828090 1076517 1196130 1435356 1656180 1794195 2153034 2392260 3588390 4306068 5382585 7176780 10765170 21530340
• Sum of all divisors σ(n): 72159360
• Sum of proper divisors (its aliquot sum) s(n): 50629020
• 21530340 is an abundant number, because the sum of its proper divisors (50629020) is greater than itself. Its abundance is 29098680

Bases of 21530340

• Binary: 1010010001000011011100100₂
• Hexadecimal: 0x14886E4
• Base-36: CTGX0

Squares and roots of 21530340

• 21530340 squared (21530340²) is 463555540515600
• 21530340 cubed (21530340³) is 9980508396184643304000
• The square root of 21530340 is 4640.0797406941
• The cube root of 21530340 is 278.1956251229

Scales and comparisons

• 21,530,340 seconds is equal to 35 weeks, 4 days, 4 hours, 39 minutes.
• To count from 1 to 21,530,340 would take you about two days!

  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 21530340 cubic inches would be around 23.2 feet tall.

Recreational maths with 21530340

• 21530340 backwards is 04303512
• 21530340 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21530340's digits is 18
• More coming soon!