21538736109

Names of 21538736109

• Cardinal: 21538736109 can be written as Twenty-one billion, five hundred thirty-eight million, seven hundred thirty-six thousand, one hundred nine.

Scientific notation

• Scientific notation: 2.1538736109 × 10¹⁰

Factors of 21538736109

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 874

Divisors of 21538736109

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 9 11 17 27 31 33 51 93 99 153 187 241 279 297 341 459 527 561 571 723 837 1023 1581 1683 1713 2169 2651 3069 4097 4743 5049 5139 5797 6281 6507 7471 7953 9207 9707 12291 14229 15417 17391 17701 18843 22413 23859 29121 36873 45067 52173 53103 56529 67239 71577 82181 87363 106777 110619 127007 135201 137611 156519 159309 169587 194711 201717 246543 262089 300917 320331 381021 405603 412833 477927 584133 739629 902751 960993 1143063 1216809 1238499 1397077 1513721 1752399 2218887 2339387 2708253 2882979 3310087 3429189 3715497 4191231 4265941 4541163 5257197 7018161 8124759 9930261 12573693 12797823 13623489 21054483 25733257 29790783 37721079 38393469 40870467 46925351 63163449 72520997 77199771 89372349 115180407 140776053 217562991 231599313 422328159 652688973 694797939 797730967 1266984477 1958066919 2393192901 7179578703 21538736109
• Sum of all divisors σ(n): 38271467520
• Sum of proper divisors (its aliquot sum) s(n): 16732731411
• 21538736109 is a deficient number, because the sum of its proper divisors (16732731411) is less than itself. Its deficiency is 4806004698

Bases of 21538736109

• Binary: 10100000011110011110000011111101101₂
• Hexadecimal: 0x503CF07ED
• Base-36: 9W7LV59

Squares and roots of 21538736109

• 21538736109 squared (21538736109²) is 463917153173140459881
• 21538736109 cubed (21538736109³) is 9992189138634804352167760543029
• The square root of 21538736109 is 146760.8125795167
• The cube root of 21538736109 is 2782.3178273799

Scales and comparisons

• 21,538,736,109 seconds is equal to 684 years, 44 weeks, 6 days, 22 hours, 15 minutes, 9 seconds.
• To count from 1 to 21,538,736,109 would take you about one thousand, three hundred sixty-nine 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 21538736109 cubic inches would be around 231.9 feet tall.

Recreational maths with 21538736109

• 21538736109 backwards is 90163783512
• The number of decimal digits it has is: 11
• The sum of 21538736109's digits is 45
• More coming soon!