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18180042954 = 23197919710247
BaseRepresentation
bin10000111011100111…
…010111000011001010
31201220222221212112020
4100323213113003022
5244213042333304
612203553225310
71212342546453
oct207347270312
951828855466
1018180042954
11778a184397
123634562236
13193961ab88
14c466d612a
157160be5d9
hex43b9d70ca

18180042954 has 64 divisors (see below), whose sum is σ = 38958796800. Its totient is φ = 5639070528.

The previous prime is 18180042943. The next prime is 18180042977. The reversal of 18180042954 is 45924008181.

It is a super-2 number, since 2×181800429542 (a number of 21 digits) contains 22 as substring.

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, 1769059 + ... + 1779305.

It is an arithmetic number, because the mean of its divisors is an integer number (608731200).

Almost surely, 218180042954 is an apocalyptic number.

18180042954 is an abundant number, since it is smaller than the sum of its proper divisors (20778753846).

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

18180042954 is a wasteful number, since it uses less digits than its factorization.

18180042954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 18180042954 in words is "eighteen billion, one hundred eighty million, forty-two thousand, nine hundred fifty-four".

Divisors: 1 2 3 6 19 38 57 79 114 158 197 237 394 474 591 1182 1501 3002 3743 4503 7486 9006 10247 11229 15563 20494 22458 30741 31126 46689 61482 93378 194693 295697 389386 584079 591394 809513 887091 1168158 1619026 1774182 2018659 2428539 4037318 4857078 6055977 12111954 15380747 30761494 38354521 46142241 76709042 92284482 115063563 159474061 230127126 318948122 478422183 956844366 3030007159 6060014318 9090021477 18180042954