21287202816

Names of 21287202816

• Cardinal: 21287202816 can be written as Twenty-one billion, two hundred eighty-seven million, two hundred two thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 2.1287202816 × 10¹⁰

Factors of 21287202816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 258

Divisors of 21287202816

• Number of divisors d(n): 312
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 32 33 44 48 64 66 88 96 103 121 128 132 139 176 192 206 242 256 264 278 309 352 363 384 412 417 484 512 528 556 618 704 726 768 824 834 968 1024 1056 1112 1133 1236 1408 1452 1529 1536 1648 1668 1936 2048 2112 2224 2266 2472 2816 2904 3058 3072 3296 3336 3399 3872 4096 4224 4448 4532 4587 4944 5632 5808 6116 6144 6592 6672 6798 7744 8448 8896 9064 9174 9888 11264 11616 12232 12288 12463 13184 13344 13596 14317 15488 16819 16896 17792 18128 18348 19776 22528 23232 24464 24926 26368 26688 27192 28634 30976 33638 33792 35584 36256 36696 37389 39552 42951 45056 46464 48928 49852 50457 52736 53376 54384 57268 61952 67276 67584 71168 72512 73392 74778 79104 85902 92928 97856 99704 100914 105472 106752 108768 114536 123904 134552 135168 142336 145024 146784 149556 157487 158208 171804 185856 195712 199408 201828 210944 213504 217536 229072 247808 269104 284672 290048 293568 299112 314974 316416 343608 371712 391424 398816 403656 421888 427008 435072 458144 472461 495616 538208 569344 580096 587136 598224 629948 632832 687216 743424 782848 797632 807312 854016 870144 916288 944922 1076416 1160192 1174272 1196448 1259896 1265664 1374432 1486848 1565696 1595264 1614624 1708032 1732357 1740288 1832576 1889844 2152832 2320384 2348544 2392896 2519792 2748864 3131392 3190528 3229248 3464714 3480576 3665152 3779688 4305664 4640768 4697088 4785792 5039584 5197071 5497728 6262784 6381056 6458496 6929428 6961152 7330304 7559376 8611328 9394176 9571584 10079168 10394142 10995456 12762112 12916992 13858856 13922304 14660608 15118752 17222656 18788352 19143168 20158336 20788284 21990912 25524224 25833984 27717712 29321216 30237504 34445312 38286336 40316672 41576568 43981824 51048448 51667968 55435424 58642432 60475008 68890624 76572672 80633344 83153136 87963648 103335936 110870848 120950016 153145344 161266688 166306272 175927296 206671872 221741696 241900032 322533376 332612544 443483392 483800064 645066752 665225088 886966784 967600128 1330450176 1773933568 1935200256 2660900352 3547867136 5321800704 7095734272 10643601408 21287202816
• Sum of all divisors σ(n): 63446830720
• Sum of proper divisors (its aliquot sum) s(n): 42159627904
• 21287202816 is an abundant number, because the sum of its proper divisors (42159627904) is greater than itself. Its abundance is 20872425088

Bases of 21287202816

• Binary: 10011110100110100001111000000000000₂
• Hexadecimal: 0x4F4D0F000
• Base-36: 9S1UMTC

Squares and roots of 21287202816

• 21287202816 squared (21287202816²) is 453145003729518329856
• 21287202816 cubed (21287202816³) is 9646189599447333093634260074496
• The square root of 21287202816 is 145901.3461761063
• The cube root of 21287202816 is 2771.4445851181

Scales and comparisons

• 21,287,202,816 seconds is equal to 676 years, 45 weeks, 15 hours, 53 minutes, 36 seconds.
• To count from 1 to 21,287,202,816 would take you about one thousand, three hundred fifty-three 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 21287202816 cubic inches would be around 231 feet tall.

Recreational maths with 21287202816

• 21287202816 backwards is 61820278212
• The number of decimal digits it has is: 11
• The sum of 21287202816's digits is 39
• More coming soon!