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18163028371 = 317144918379
BaseRepresentation
bin10000111010100110…
…011101000110010011
31201212210221102220111
4100322212131012103
5244144213401441
612202144422151
71212045123325
oct207246350623
951783842814
1018163028371
117780613054
12362a917957
131935c41587
14c44347615
1571485d081
hex43a99d193

18163028371 has 16 divisors (see below), whose sum is σ = 19056384000. Its totient is φ = 17290022400.

The previous prime is 18163028353. The next prime is 18163028381. The reversal of 18163028371 is 17382036181.

It is a cyclic number.

It is not a de Polignac number, because 18163028371 - 25 = 18163028339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18163028341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979060 + ... + 997438.

It is an arithmetic number, because the mean of its divisors is an integer number (1191024000).

Almost surely, 218163028371 is an apocalyptic number.

18163028371 is a deficient number, since it is larger than the sum of its proper divisors (893355629).

18163028371 is a wasteful number, since it uses less digits than its factorization.

18163028371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 18163028371 in words is "eighteen billion, one hundred sixty-three million, twenty-eight thousand, three hundred seventy-one".

Divisors: 1 31 71 449 2201 13919 18379 31879 569749 988249 1304909 8252171 40452179 255817301 585904141 18163028371