21123072

Names of 21123072

• Cardinal: 21123072 can be written as Twenty-one million, one hundred twenty-three thousand and seventy-two.

Scientific notation

• Scientific notation: 2.1123072 × 10⁷

Factors of 21123072

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 196

Divisors of 21123072

• Number of divisors d(n): 104
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 96 108 128 144 191 192 216 256 288 382 384 432 512 573 576 764 768 864 1024 1146 1152 1528 1536 1719 1728 2048 2292 2304 3056 3072 3438 3456 4096 4584 4608 5157 6112 6144 6876 6912 9168 9216 10314 12224 12288 13752 13824 18336 18432 20628 24448 27504 27648 36672 36864 41256 48896 55008 55296 73344 82512 97792 110016 110592 146688 165024 195584 220032 293376 330048 391168 440064 586752 660096 782336 880128 1173504 1320192 1760256 2347008 2640384 3520512 5280768 7041024 10561536 21123072
• Sum of all divisors σ(n): 62906880
• Sum of proper divisors (its aliquot sum) s(n): 41783808
• 21123072 is an abundant number, because the sum of its proper divisors (41783808) is greater than itself. Its abundance is 20660736

Bases of 21123072

• Binary: 1010000100101000000000000₂
• Hexadecimal: 0x1425000
• Base-36: CKQO0

Squares and roots of 21123072

• 21123072 squared (21123072²) is 446184170717184
• 21123072 cubed (21123072³) is 9424780363319369269248
• The square root of 21123072 is 4595.9843341769
• The cube root of 21123072 is 276.4303305837

Scales and comparisons

• 21,123,072 seconds is equal to 34 weeks, 6 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,123,072 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 21123072 cubic inches would be around 23 feet tall.

Recreational maths with 21123072

• 21123072 backwards is 27032112
• 21123072 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21123072's digits is 18
• More coming soon!