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18268968760 = 23572910132221
BaseRepresentation
bin10001000000111010…
…100101011100111000
31202011012021202210121
4101000322211130320
5244403324000020
612220451223024
71214502446410
oct210072453470
952135252717
1018268968760
1178253a1699
12365a2a7a74
131951b84bb3
14c54443640
1571dcd7baa
hex440ea5738

18268968760 has 128 divisors (see below), whose sum is σ = 48667132800. Its totient is φ = 6038968320.

The previous prime is 18268968743. The next prime is 18268968797. The reversal of 18268968760 is 6786986281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8224450 + ... + 8226670.

It is an arithmetic number, because the mean of its divisors is an integer number (380211975).

Almost surely, 218268968760 is an apocalyptic number.

18268968760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18268968760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24333566400).

18268968760 is an abundant number, since it is smaller than the sum of its proper divisors (30398164040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18268968760 is a wasteful number, since it uses less digits than its factorization.

18268968760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 18268968760 in words is "eighteen billion, two hundred sixty-eight million, nine hundred sixty-eight thousand, seven hundred sixty".

Divisors: 1 2 4 5 7 8 10 14 20 28 29 35 40 56 58 70 116 140 145 203 232 280 290 406 580 812 1013 1015 1160 1624 2026 2030 2221 4052 4060 4442 5065 7091 8104 8120 8884 10130 11105 14182 15547 17768 20260 22210 28364 29377 31094 35455 40520 44420 56728 58754 62188 64409 70910 77735 88840 117508 124376 128818 141820 146885 155470 205639 235016 257636 283640 293770 310940 322045 411278 450863 515272 587540 621880 644090 822556 901726 1028195 1175080 1288180 1645112 1803452 2056390 2249873 2254315 2576360 3606904 4112780 4499746 4508630 8225560 8999492 9017260 11249365 15749111 17998984 18034520 22498730 31498222 44997460 62996444 65246317 78745555 89994920 125992888 130492634 157491110 260985268 314982220 326231585 456724219 521970536 629964440 652463170 913448438 1304926340 1826896876 2283621095 2609852680 3653793752 4567242190 9134484380 18268968760