21051828

Names of 21051828

• Cardinal: 21051828 can be written as Twenty-one million, fifty-one thousand, eight hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1051828 × 10⁷

Factors of 21051828

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 752

Divisors of 21051828

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 28 36 42 63 84 126 139 252 278 417 556 601 834 973 1202 1251 1668 1803 1946 2404 2502 2919 3606 3892 4207 5004 5409 5838 7212 8414 8757 10818 11676 12621 16828 17514 21636 25242 35028 37863 50484 75726 83539 151452 167078 250617 334156 501234 584773 751851 1002468 1169546 1503702 1754319 2339092 3007404 3508638 5262957 7017276 10525914 21051828
• Sum of all divisors σ(n): 61355840
• Sum of proper divisors (its aliquot sum) s(n): 40304012
• 21051828 is an abundant number, because the sum of its proper divisors (40304012) is greater than itself. Its abundance is 19252184

Bases of 21051828

• Binary: 1010000010011100110110100₂
• Hexadecimal: 0x14139B4
• Base-36: CJ7P0

Squares and roots of 21051828

• 21051828 squared (21051828²) is 443179462141584
• 21051828 cubed (21051828³) is 9329737810137138015552
• The square root of 21051828 is 4588.2271085899
• The cube root of 21051828 is 276.1191986707

Scales and comparisons

• 21,051,828 seconds is equal to 34 weeks, 5 days, 15 hours, 43 minutes, 48 seconds.
• To count from 1 to 21,051,828 would take you about eleven hours!

  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 21051828 cubic inches would be around 23 feet tall.

Recreational maths with 21051828

• 21051828 backwards is 82815012
• The number of decimal digits it has is: 8
• The sum of 21051828's digits is 27
• More coming soon!