21206567720

Names of 21206567720

• Cardinal: 21206567720 can be written as Twenty-one billion, two hundred six million, five hundred sixty-seven thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.120656772 × 10¹⁰

Factors of 21206567720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3963

Divisors of 21206567720

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 13 17 20 26 34 40 52 65 68 85 104 130 136 170 221 260 340 442 520 680 757 884 1105 1514 1768 2210 3028 3169 3785 4420 6056 6338 7570 8840 9841 12676 12869 15140 15845 19682 25352 25738 30280 31690 39364 41197 49205 51476 53873 63380 64345 78728 82394 98410 102952 107746 126760 128690 164788 167297 196820 205985 215492 257380 269365 329576 334594 393640 411970 430984 514760 538730 669188 700349 823940 836485 1077460 1338376 1400698 1647880 1672970 2154920 2398933 2801396 3345940 3501745 4797866 5602792 6691880 7003490 9595732 11994665 14006980 19191464 23989330 28013960 31186129 40781861 47978660 62372258 81563722 95957320 124744516 155930645 163127444 203909305 249489032 311861290 326254888 407818610 530164193 623722580 815637220 1060328386 1247445160 1631274440 2120656772 2650820965 4241313544 5301641930 10603283860 21206567720
• Sum of all divisors σ(n): 54496864800
• Sum of proper divisors (its aliquot sum) s(n): 33290297080
• 21206567720 is an abundant number, because the sum of its proper divisors (33290297080) is greater than itself. Its abundance is 12083729360

Bases of 21206567720

• Binary: 10011110000000000101000101100101000₂
• Hexadecimal: 0x4F0028B28
• Base-36: 9QPUCDK

Squares and roots of 21206567720

• 21206567720 squared (21206567720²) is 449718514462945998400
• 21206567720 cubed (21206567720³) is 9536986131896263745772611648000
• The square root of 21206567720 is 145624.7496821883
• The cube root of 21206567720 is 2767.9407825465

Scales and comparisons

• 21,206,567,720 seconds is equal to 674 years, 15 weeks, 5 days, 9 hours, 15 minutes, 20 seconds.
• To count from 1 to 21,206,567,720 would take you about one thousand, three hundred forty-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 21206567720 cubic inches would be around 230.7 feet tall.

Recreational maths with 21206567720

• 21206567720 backwards is 02776560212
• The number of decimal digits it has is: 11
• The sum of 21206567720's digits is 38
• More coming soon!