21729451842

Names of 21729451842

• Cardinal: 21729451842 can be written as Twenty-one billion, seven hundred twenty-nine million, four hundred fifty-one thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 2.1729451842 × 10¹⁰

Factors of 21729451842

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 510

Divisors of 21729451842

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 42 61 63 113 122 126 127 183 197 226 254 339 366 381 394 427 549 591 678 762 791 854 889 1017 1098 1143 1182 1281 1379 1582 1773 1778 2034 2286 2373 2562 2667 2758 3546 3843 4137 4746 5334 6893 7119 7686 7747 8001 8274 12017 12411 13786 14238 14351 15494 16002 20679 22261 23241 24034 24822 25019 28702 36051 41358 43053 44522 46482 48251 50038 54229 62037 66783 69723 72102 75057 84119 86106 96502 100457 108153 108458 124074 129159 133566 139446 144753 150114 155827 162687 168238 175133 200349 200914 216306 225171 252357 258318 289506 301371 311654 325374 350266 400698 434259 450342 467481 488061 504714 525399 602742 757071 868518 875411 904113 934962 976122 1050798 1357921 1402443 1514142 1526159 1576197 1750822 1808226 2626233 2715842 2804886 2827147 3052318 3152394 4073763 4578477 5252466 5654294 6127877 7878699 8147526 8481441 9156954 9505447 10683113 12221289 12255754 13735431 15757398 16962882 18383631 19010894 19790029 21366226 24442578 25444323 27470862 28516341 32049339 36767262 39580058 50888646 55150893 57032682 59370087 64098678 85549023 96148017 110301786 118740174 171098046 172455967 178110261 192296034 344911934 356220522 517367901 1034735802 1207191769 1552103703 2414383538 3104207406 3621575307 7243150614 10864725921 21729451842
• Sum of all divisors σ(n): 55888994304
• Sum of proper divisors (its aliquot sum) s(n): 34159542462
• 21729451842 is an abundant number, because the sum of its proper divisors (34159542462) is greater than itself. Its abundance is 12430090620

Bases of 21729451842

• Binary: 10100001111001011010001111101000010₂
• Hexadecimal: 0x50F2D1F42
• Base-36: 9ZD5KCI

Squares and roots of 21729451842

• 21729451842 squared (21729451842²) is 472169077353797192964
• 21729451842 cubed (21729451842³) is 10259975227640908900346019239688
• The square root of 21729451842 is 147409.1307958907
• The cube root of 21729451842 is 2790.5057617823

Scales and comparisons

• 21,729,451,842 seconds is equal to 690 years, 48 weeks, 2 days, 6 hours, 50 minutes, 42 seconds.
• To count from 1 to 21,729,451,842 would take you about one thousand, three hundred eighty-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 21729451842 cubic inches would be around 232.5 feet tall.

Recreational maths with 21729451842

• 21729451842 backwards is 24815492712
• The number of decimal digits it has is: 11
• The sum of 21729451842's digits is 45
• More coming soon!