21129616872

Names of 21129616872

• Cardinal: 21129616872 can be written as Twenty-one billion, one hundred twenty-nine million, six hundred sixteen thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 2.1129616872 × 10¹⁰

Factors of 21129616872

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 598

Divisors of 21129616872

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 18 21 24 26 28 36 39 42 52 56 63 67 72 78 84 91 104 117 126 127 134 156 168 182 201 234 252 254 268 273 312 364 379 381 402 468 469 504 508 536 546 603 728 758 762 804 819 871 889 936 938 1016 1092 1137 1143 1206 1407 1516 1524 1608 1638 1651 1742 1778 1876 2184 2274 2286 2412 2613 2653 2667 2814 3032 3048 3276 3302 3411 3484 3556 3752 4221 4548 4572 4824 4927 4953 5226 5306 5334 5628 6097 6552 6604 6822 6968 7112 7839 7959 8001 8442 8509 9096 9144 9854 9906 10452 10612 10668 11256 11557 12194 13208 13644 14781 14859 15678 15918 16002 16884 17018 18291 19708 19812 20904 21224 21336 23114 23877 24388 25393 25527 27288 29562 29718 31356 31836 32004 33768 34036 34489 34671 36582 39416 39624 44343 46228 47754 48133 48776 50786 51054 54873 59124 59436 59563 62712 63672 64008 68072 68978 69342 73164 76179 76581 88686 92456 95508 96266 101572 102108 103467 104013 109746 110617 118248 118872 119126 137956 138684 144399 146328 152358 153162 177372 177751 178689 191016 192532 203144 204216 206934 208026 219492 221234 228537 238252 275912 277368 288798 304716 306324 310401 330109 331851 336931 354744 355502 357378 385064 413868 416052 433197 438984 442468 457074 476504 533253 536067 577596 609432 612648 620802 625729 660218 663702 673862 711004 714756 774319 827736 832104 866394 884936 914148 990327 995553 1010793 1066506 1072134 1155192 1241604 1251458 1320436 1327404 1347724 1422008 1429512 1548638 1599759 1732788 1828296 1877187 1980654 1991106 2021586 2133012 2144268 2310763 2322957 2483208 2502916 2640872 2654808 2695448 2970981 3032379 3097276 3199518 3224911 3465576 3754374 3961308 3982212 4043172 4266024 4288536 4380103 4621526 4645914 5005832 5631561 5941962 6064758 6194552 6399036 6449822 6932289 6968871 7508748 7922616 7964424 8086344 8760206 9243052 9291828 9674733 11263122 11883924 12129516 12798072 12899644 13140309 13864578 13937742 15017496 17520412 18486104 18583656 19349466 20796867 22526244 22574377 23767848 24259032 25799288 26280618 27729156 27875484 29024199 35040824 38698932 39420927 41593734 41923843 45052488 45148754 52561236 55458312 55750968 58048398 67723131 77397864 78841854 83187468 83847686 90297508 105122472 116096796 125771529 135446262 157683708 166374936 167695372 180595016 203169393 232193592 251543058 270892524 293466901 315367416 335390744 377314587 406338786 503086116 541785048 586933802 754629174 812677572 880400703 1006172232 1173867604 1509258348 1625355144 1760801406 2347735208 2641202109 3018516696 3521602812 5282404218 7043205624 10564808436 21129616872
• Sum of all divisors σ(n): 72236236800
• Sum of proper divisors (its aliquot sum) s(n): 51106619928
• 21129616872 is an abundant number, because the sum of its proper divisors (51106619928) is greater than itself. Its abundance is 29977003056

Bases of 21129616872

• Binary: 10011101011011011000101110111101000₂
• Hexadecimal: 0x4EB6C5DE8
• Base-36: 9PG10Q0

Squares and roots of 21129616872

• 21129616872 squared (21129616872²) is 446460709157507064384
• 21129616872 cubed (21129616872³) is 9433543732899546173067356686848
• The square root of 21129616872 is 145360.3001923153
• The cube root of 21129616872 is 2764.5887779347

Scales and comparisons

• 21,129,616,872 seconds is equal to 671 years, 44 weeks, 3 days, 18 hours, 1 minute, 12 seconds.
• To count from 1 to 21,129,616,872 would take you about one thousand, three hundred forty-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 21129616872 cubic inches would be around 230.4 feet tall.

Recreational maths with 21129616872

• 21129616872 backwards is 27861692112
• The number of decimal digits it has is: 11
• The sum of 21129616872's digits is 45
• More coming soon!