21511849072

Names of 21511849072

• Cardinal: 21511849072 can be written as Twenty-one billion, five hundred eleven million, eight hundred forty-nine thousand and seventy-two.

Scientific notation

• Scientific notation: 2.1511849072 × 10¹⁰

Factors of 21511849072

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1410

Divisors of 21511849072

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 7 8 14 16 28 49 56 73 98 112 146 196 292 392 409 511 584 784 818 919 1022 1168 1636 1838 2044 2863 3272 3577 3676 4088 5726 6433 6544 7154 7352 8176 11452 12866 14308 14704 20041 22904 25732 28616 29857 40082 45031 45808 51464 57232 59714 67087 80164 90062 102928 119428 134174 160328 180124 208999 238856 268348 320656 360248 375871 417998 469609 477712 536696 720496 751742 835996 939218 1073392 1462993 1503484 1671992 1878436 2631097 2925986 3006968 3287263 3343984 3756872 5262194 5851972 6013936 6574526 7513744 10524388 11703944 13149052 18417679 21048776 23407888 26298104 27438583 36835358 42097552 52596208 54877166 73670716 109754332 147341432 192070081 219508664 294682864 384140162 439017328 768280324 1344490567 1536560648 2688981134 3073121296 5377962268 10755924536 21511849072
• Sum of all divisors σ(n): 49321917600
• Sum of proper divisors (its aliquot sum) s(n): 27810068528
• 21511849072 is an abundant number, because the sum of its proper divisors (27810068528) is greater than itself. Its abundance is 6298219456

Bases of 21511849072

• Binary: 10100000010001101001100010001110000₂
• Hexadecimal: 0x50234C470
• Base-36: 9VRLKZ4

Squares and roots of 21511849072

• 21511849072 squared (21511849072²) is 462759650496507261184
• 21511849072 cubed (21511849072³) is 9954815758092334065742292021248
• The square root of 21511849072 is 146669.1824208481
• The cube root of 21511849072 is 2781.1596128403

Scales and comparisons

• 21,511,849,072 seconds is equal to 684 years, 3 days, 17 hours, 37 minutes, 52 seconds.
• To count from 1 to 21,511,849,072 would take you about one thousand, three hundred sixty-eight 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 21511849072 cubic inches would be around 231.8 feet tall.

Recreational maths with 21511849072

• 21511849072 backwards is 27094811512
• The number of decimal digits it has is: 11
• The sum of 21511849072's digits is 40
• More coming soon!