21505557472

Names of 21505557472

• Cardinal: 21505557472 can be written as Twenty-one billion, five hundred five million, five hundred fifty-seven thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 2.1505557472 × 10¹⁰

Factors of 21505557472

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 249

Divisors of 21505557472

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 41 49 56 82 98 112 164 196 199 224 287 328 392 398 574 656 784 796 1148 1312 1393 1568 1592 1681 2009 2296 2786 3184 3362 4018 4592 5572 6368 6724 8036 8159 9184 9751 11144 11767 13448 16072 16318 19502 22288 23534 26896 32144 32636 39004 44576 47068 53792 57113 64288 65272 68921 78008 82369 94136 114226 130544 137842 156016 164738 188272 228452 261088 275684 312032 329476 334519 376544 399791 456904 482447 551368 658952 669038 799582 913808 964894 1102736 1317904 1338076 1599164 1827616 1929788 2205472 2341633 2635808 2676152 3198328 3377129 3859576 4683266 5352304 6396656 6754258 7719152 9366532 10704608 12793312 13508516 13715279 15438304 16391431 18733064 27017032 27430558 32782862 37466128 54034064 54861116 65565724 74932256 96006953 108068128 109722232 131131448 192013906 219444464 262262896 384027812 438888928 524525792 672048671 768055624 1344097342 1536111248 2688194684 3072222496 5376389368 10752778736 21505557472
• Sum of all divisors σ(n): 50736520800
• Sum of proper divisors (its aliquot sum) s(n): 29230963328
• 21505557472 is an abundant number, because the sum of its proper divisors (29230963328) is greater than itself. Its abundance is 7725405856

Bases of 21505557472

• Binary: 10100000001110101001100001111100000₂
• Hexadecimal: 0x501D4C3E0
• Base-36: 9VNUQCG

Squares and roots of 21505557472

• 21505557472 squared (21505557472²) is 462489002181495030784
• 21505557472 cubed (21505557472³) is 9946083816582074759407721218048
• The square root of 21505557472 is 146647.7325839033
• The cube root of 21505557472 is 2780.8884498809

Scales and comparisons

• 21,505,557,472 seconds is equal to 683 years, 42 weeks, 21 hours, 57 minutes, 52 seconds.
• To count from 1 to 21,505,557,472 would take you about one thousand, three hundred sixty-seven 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 21505557472 cubic inches would be around 231.7 feet tall.

Recreational maths with 21505557472

• 21505557472 backwards is 27475550512
• The number of decimal digits it has is: 11
• The sum of 21505557472's digits is 43
• More coming soon!