21147308

Names of 21147308

• Cardinal: 21147308 can be written as Twenty-one million, one hundred forty-seven thousand, three hundred eight.

Scientific notation

• Scientific notation: 2.1147308 × 10⁷

Factors of 21147308

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 172

Divisors of 21147308

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 7 13 14 26 28 41 52 82 91 109 164 169 182 218 287 338 364 436 533 574 676 763 1066 1148 1183 1417 1526 2132 2366 2834 3052 3731 4469 4732 5668 6929 7462 8938 9919 13858 14924 17876 18421 19838 27716 31283 36842 39676 48503 58097 62566 73684 97006 116194 125132 128947 194012 232388 257894 406679 515788 755261 813358 1510522 1626716 3021044 5286827 10573654 21147308
• Sum of all divisors σ(n): 47345760
• Sum of proper divisors (its aliquot sum) s(n): 26198452
• 21147308 is an abundant number, because the sum of its proper divisors (26198452) is greater than itself. Its abundance is 5051144

Bases of 21147308

• Binary: 1010000101010111010101100₂
• Hexadecimal: 0x142AEAC
• Base-36: CL9D8

Squares and roots of 21147308

• 21147308 squared (21147308²) is 447208635646864
• 21147308 cubed (21147308³) is 9457258758284012242112
• The square root of 21147308 is 4598.6202278507
• The cube root of 21147308 is 276.5360128889

Scales and comparisons

• 21,147,308 seconds is equal to 34 weeks, 6 days, 18 hours, 15 minutes, 8 seconds.
• To count from 1 to 21,147,308 would take you about three 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 21147308 cubic inches would be around 23 feet tall.

Recreational maths with 21147308

• 21147308 backwards is 80374112
• 21147308 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21147308's digits is 26
• More coming soon!