21353043868

Names of 21353043868

• Cardinal: 21353043868 can be written as Twenty-one billion, three hundred fifty-three million, forty-three thousand, eight hundred sixty-eight.

Scientific notation

• Scientific notation: 2.1353043868 × 10¹⁰

Factors of 21353043868

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 45392

Divisors of 21353043868

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 13 17 26 34 41 52 68 82 164 169 221 338 442 533 676 697 884 1066 1394 2132 2788 2873 5746 6929 9061 11492 13858 18122 27716 36244 45319 90638 117793 181276 235586 471172 589147 770423 1178294 1540846 1858079 2356588 3081692 3716158 7432316 7658911 10015499 15317822 20030998 24155027 30635644 31587343 40061996 48310054 63174686 96620108 126349372 130201487 260402974 314015351 410635459 520805948 628030702 821270918 1256061404 1642541836 5338260967 10676521934 21353043868
• Sum of all divisors σ(n): 43889519520
• Sum of proper divisors (its aliquot sum) s(n): 22536475652
• 21353043868 is an abundant number, because the sum of its proper divisors (22536475652) is greater than itself. Its abundance is 1183431784

Bases of 21353043868

• Binary: 10011111000101111011001011110011100₂
• Hexadecimal: 0x4F8BD979C
• Base-36: 9T51U3G

Squares and roots of 21353043868

• 21353043868 squared (21353043868²) is 455952482428732401424
• 21353043868 cubed (21353043868³) is 9735973359024222151239657668032
• The square root of 21353043868 is 146126.8074926705
• The cube root of 21353043868 is 2774.2989920661

Scales and comparisons

• 21,353,043,868 seconds is equal to 678 years, 49 weeks, 6 days, 17 hours, 4 minutes, 28 seconds.
• To count from 1 to 21,353,043,868 would take you about one thousand, three hundred fifty-seven years!

  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 21353043868 cubic inches would be around 231.2 feet tall.

Recreational maths with 21353043868

• 21353043868 backwards is 86834035312
• The number of decimal digits it has is: 11
• The sum of 21353043868's digits is 43
• More coming soon!