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18182102920 = 235974999391
BaseRepresentation
bin10000111011101111…
…001101111110001000
31201221010211112021021
4100323233031332020
5244214104243140
612204105322224
71212366216262
oct207357157610
951833745237
1018182102920
117790361043
123635196374
131939b8c6a7
14c46ab0b32
15716379b4a
hex43bbcdf88

18182102920 has 64 divisors (see below), whose sum is σ = 41418720000. Its totient is φ = 7182673920.

The previous prime is 18182102903. The next prime is 18182102951. The reversal of 18182102920 is 2920128181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1931425 + ... + 1940815.

It is an arithmetic number, because the mean of its divisors is an integer number (647167500).

Almost surely, 218182102920 is an apocalyptic number.

18182102920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18182102920 is an abundant number, since it is smaller than the sum of its proper divisors (23236617080).

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

18182102920 is a wasteful number, since it uses less digits than its factorization.

18182102920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9998 (or 9994 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 18182102920 in words is "eighteen billion, one hundred eighty-two million, one hundred two thousand, nine hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 97 194 388 485 499 776 970 998 1940 1996 2495 3880 3992 4990 9391 9980 18782 19960 37564 46955 48403 75128 93910 96806 187820 193612 242015 375640 387224 484030 910927 968060 1821854 1936120 3643708 4554635 4686109 7287416 9109270 9372218 18218540 18744436 23430545 36437080 37488872 46861090 93722180 187444360 454552573 909105146 1818210292 2272762865 3636420584 4545525730 9091051460 18182102920