21101742

Names of 21101742

• Cardinal: 21101742 can be written as Twenty-one million, one hundred one thousand, seven hundred forty-two.

Scientific notation

• Scientific notation: 2.1101742 × 10⁷

Factors of 21101742

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 312

Divisors of 21101742

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 9 18 19 27 38 54 57 114 131 157 171 262 314 342 393 471 513 786 942 1026 1179 1413 2358 2489 2826 2983 3537 4239 4978 5966 7074 7467 8478 8949 14934 17898 20567 22401 26847 41134 44802 53694 61701 67203 80541 123402 134406 161082 185103 370206 390773 555309 781546 1110618 1172319 2344638 3516957 7033914 10550871 21101742
• Sum of all divisors σ(n): 50054400
• Sum of proper divisors (its aliquot sum) s(n): 28952658
• 21101742 is an abundant number, because the sum of its proper divisors (28952658) is greater than itself. Its abundance is 7850916

Bases of 21101742

• Binary: 1010000011111110010101110₂
• Hexadecimal: 0x141FCAE
• Base-36: CKA7I

Squares and roots of 21101742

• 21101742 squared (21101742²) is 445283515434564
• 21101742 cubed (21101742³) is 9396257859553187410488
• The square root of 21101742 is 4593.6632440787
• The cube root of 21101742 is 276.3372531381

Scales and comparisons

• 21,101,742 seconds is equal to 34 weeks, 6 days, 5 hours, 35 minutes, 42 seconds.
• To count from 1 to 21,101,742 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 21101742 cubic inches would be around 23 feet tall.

Recreational maths with 21101742

• 21101742 backwards is 24710112
• 21101742 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21101742's digits is 18
• More coming soon!