21099212820

Names of 21099212820

• Cardinal: 21099212820 can be written as Twenty-one billion, ninety-nine million, two hundred twelve thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.109921282 × 10¹⁰

Factors of 21099212820

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 341760

Divisors of 21099212820

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 49 60 63 70 84 90 98 105 126 140 147 180 196 210 245 252 294 315 343 420 441 490 588 630 686 735 882 980 1029 1260 1372 1470 1715 1764 2058 2205 2940 3087 3430 4116 4410 5145 6174 6860 8820 10290 12348 15435 20580 30870 61740 341743 683486 1025229 1366972 1708715 2050458 2392201 3075687 3417430 4100916 4784402 5126145 6151374 6834860 7176603 9568804 10252290 11961005 12302748 14353206 15378435 16745407 20504580 21529809 23922010 28706412 30756870 33490814 35883015 43059618 47844020 50236221 61513740 66981628 71766030 83727035 86119236 100472442 107649045 117217849 143532060 150708663 167454070 200944884 215298090 234435698 251181105 301417326 334908140 351653547 430596180 468871396 502362210 586089245 602834652 703307094 753543315 1004724420 1054960641 1172178490 1406614188 1507086630 1758267735 2109921282 2344356980 3014173260 3516535470 4219842564 5274803205 7033070940 10549606410 21099212820
• Sum of all divisors σ(n): 74636889600
• Sum of proper divisors (its aliquot sum) s(n): 53537676780
• 21099212820 is an abundant number, because the sum of its proper divisors (53537676780) is greater than itself. Its abundance is 32438463960

Bases of 21099212820

• Binary: 10011101001100111000111000000010100₂
• Hexadecimal: 0x4E99C7014
• Base-36: 9OXXCT0

Squares and roots of 21099212820

• 21099212820 squared (21099212820²) is 445176781623652352400
• 21099212820 cubed (21099212820³) is 9392879658000106128981237768000
• The square root of 21099212820 is 145255.6808527639
• The cube root of 21099212820 is 2763.2621242929

Scales and comparisons

• 21,099,212,820 seconds is equal to 670 years, 46 weeks, 1 day, 20 hours, 27 minutes.
• To count from 1 to 21,099,212,820 would take you about one thousand, three hundred forty-one 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 21099212820 cubic inches would be around 230.3 feet tall.

Recreational maths with 21099212820

• 21099212820 backwards is 02821299012
• 21099212820 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21099212820's digits is 36
• More coming soon!