18646389489

Names of 18646389489

• Cardinal: 18646389489 can be written as Eighteen billion, six hundred forty-six million, three hundred eighty-nine thousand, four hundred eighty-nine.

Scientific notation

• Scientific notation: 1.8646389489 × 10¹⁰

Factors of 18646389489

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1927

Divisors of 18646389489

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 13 21 39 49 73 91 147 219 273 511 637 949 1533 1831 1911 2847 3577 5329 5493 6643 10731 12817 15987 19929 23803 37303 38451 46501 69277 71409 89719 111909 133663 139503 166621 207831 261121 269157 400989 484939 499863 783363 935641 1166347 1454817 1737619 2806923 3394573 3499041 5212857 6549487 9757399 10183719 12163333 19648461 29272197 36489999 68301793 85143331 126846187 204905379 255429993 380538561 478112551 887923309 1434337653 2663769927 6215463163 18646389489
• Sum of all divisors σ(n): 31595360832
• Sum of proper divisors (its aliquot sum) s(n): 12948971343
• 18646389489 is a deficient number, because the sum of its proper divisors (12948971343) is less than itself. Its deficiency is 5697418146

Bases of 18646389489

• Binary: 10001010111011010010101001011110001₂
• Hexadecimal: 0x4576952F1
• Base-36: 8KDKU7L

Squares and roots of 18646389489

• 18646389489 squared (18646389489²) is 347687840975489681121
• 18646389489 cubed (18646389489³) is 6483122903418474296682576137169
• The square root of 18646389489 is 136551.7831776649
• The cube root of 18646389489 is 2651.7439328515

Scales and comparisons

• 18,646,389,489 seconds is equal to 592 years, 46 weeks, 4 days, 16 hours, 38 minutes, 9 seconds.
• To count from 1 to 18,646,389,489 would take you about one thousand, one hundred eighty-five 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 18646389489 cubic inches would be around 221 feet tall.

Recreational maths with 18646389489

• 18646389489 backwards is 98498364681
• The number of decimal digits it has is: 11
• The sum of 18646389489's digits is 66
• More coming soon!