18628449021

Names of 18628449021

• Cardinal: 18628449021 can be written as Eighteen billion, six hundred twenty-eight million, four hundred forty-nine thousand and twenty-one.

Scientific notation

• Scientific notation: 1.8628449021 × 10¹⁰

Factors of 18628449021

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 5124

Divisors of 18628449021

• Number of divisors d(n): 90
• Complete list of divisors:
  1 3 7 9 13 21 39 49 63 91 117 147 169 273 343 441 507 637 819 1029 1183 1521 1911 2401 3087 3549 4459 5101 5733 7203 8281 10647 13377 15303 21609 24843 31213 35707 40131 45909 57967 66313 74529 93639 107121 173901 198939 249949 280917 321363 405769 464191 521703 596817 749847 862069 1217307 1392573 1749643 2249541 2586207 3249337 3651921 4177719 5248929 6034483 7758621 9748011 12247501 15746787 18103449 22745359 29244033 36742503 42241381 54310347 68236077 110227509 126724143 159217513 204708231 295689667 380172429 477652539 887069001 1432957617 2069827669 2661207003 6209483007 18628449021
• Sum of all divisors σ(n): 33997580058
• Sum of proper divisors (its aliquot sum) s(n): 15369131037
• 18628449021 is a deficient number, because the sum of its proper divisors (15369131037) is less than itself. Its deficiency is 3259317984

Bases of 18628449021

• Binary: 10001010110010101111001001011111101₂
• Hexadecimal: 0x4565792FD
• Base-36: 8K2WB99

Squares and roots of 18628449021

• 18628449021 squared (18628449021²) is 347019112927995858441
• 18628449021 cubed (18628449021³) is 6464427854491812892667301036261
• The square root of 18628449021 is 136486.0762898543
• The cube root of 18628449021 is 2650.8932088573

Scales and comparisons

• 18,628,449,021 seconds is equal to 592 years, 17 weeks, 1 hour, 10 minutes, 21 seconds.
• To count from 1 to 18,628,449,021 would take you about one thousand, one hundred eighty-four 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 18628449021 cubic inches would be around 220.9 feet tall.

Recreational maths with 18628449021

• 18628449021 backwards is 12094482681
• The number of decimal digits it has is: 11
• The sum of 18628449021's digits is 45
• More coming soon!