18108031 has 8 divisors (see below), whose sum is σ = 18595280. Its totient is φ = 17623872.

The previous prime is 18108001. The next prime is 18108037. The reversal of 18108031 is 13080181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18108031 - 2¹⁹ = 17583743 is a prime.

It is a super-2 number, since 2×18108031² = 655801573393922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18107993 and 18108011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15475 + ... + 16603.

It is an arithmetic number, because the mean of its divisors is an integer number (2324410).

Almost surely, 2^18108031 is an apocalyptic number.

18108031 is a deficient number, since it is larger than the sum of its proper divisors (487249).

18108031 is a wasteful number, since it uses less digits than its factorization.

18108031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 18108031 is about 4255.3532168317. The cubic root of 18108031 is about 262.5973927347.

The spelling of 18108031 in words is "eighteen million, one hundred eight thousand, thirty-one".