21391141888

Names of 21391141888

• Cardinal: 21391141888 can be written as Twenty-one billion, three hundred ninety-one million, one hundred forty-one thousand, eight hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1391141888 × 10¹⁰

Factors of 21391141888

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 103

Divisors of 21391141888

• Number of divisors d(n): 198
• Complete list of divisors:
  1 2 4 8 16 17 32 34 41 43 64 68 82 86 128 136 164 172 256 272 289 328 344 512 544 578 656 688 697 731 1024 1088 1156 1312 1376 1394 1462 1681 1763 2176 2312 2624 2752 2788 2924 3362 3526 4352 4624 5248 5504 5576 5848 6724 7052 8704 9248 10496 11008 11152 11696 11849 12427 13448 14104 17408 18496 20992 22016 22304 23392 23698 24854 26896 28208 28577 29971 36992 41984 44032 44608 46784 47396 49708 53792 56416 57154 59942 72283 73984 89216 93568 94792 99416 107584 112832 114308 119884 144566 147968 178432 187136 189584 198832 215168 225664 228616 239768 289132 295936 356864 374272 379168 397664 430336 451328 457232 479536 485809 509507 578264 713728 748544 758336 795328 860672 902656 914464 959072 971618 1019014 1156528 1228811 1516672 1590656 1721344 1805312 1828928 1918144 1943236 2038028 2313056 2457622 3033344 3181312 3657856 3836288 3886472 4076056 4626112 4915244 6066688 6362624 7315712 7672576 7772944 8152112 9252224 9830488 12133376 12725248 14631424 15345152 15545888 16304224 18504448 19660976 20889787 29262848 30690304 31091776 32608448 37008896 39321952 41779574 62183552 65216896 74017792 78643904 83559148 124367104 130433792 157287808 167118296 248734208 260867584 314575616 334236592 497468416 521735168 629151232 668473184 1258302464 1336946368 2673892736 5347785472 10695570944 21391141888
• Sum of all divisors σ(n): 47642459348
• Sum of proper divisors (its aliquot sum) s(n): 26251317460
• 21391141888 is an abundant number, because the sum of its proper divisors (26251317460) is greater than itself. Its abundance is 4860175572

Bases of 21391141888

• Binary: 10011111011000000101110110000000000₂
• Hexadecimal: 0x4FB02EC00
• Base-36: 9TRQEPS

Squares and roots of 21391141888

• 21391141888 squared (21391141888²) is 457580951272548204544
• 21391141888 cubed (21391141888³) is 9788179053917092802720350339072
• The square root of 21391141888 is 146257.1088460319
• The cube root of 21391141888 is 2775.9479763355

Scales and comparisons

• 21,391,141,888 seconds is equal to 680 years, 8 weeks, 6 days, 15 hours, 51 minutes, 28 seconds.
• To count from 1 to 21,391,141,888 would take you about one thousand, three hundred sixty 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 21391141888 cubic inches would be around 231.3 feet tall.

Recreational maths with 21391141888

• 21391141888 backwards is 88814119312
• The number of decimal digits it has is: 11
• The sum of 21391141888's digits is 46
• More coming soon!