18097131 has 16 divisors (see below), whose sum is σ = 26883360. Its totient is φ = 10752000.

The previous prime is 18097117. The next prime is 18097141. The reversal of 18097131 is 13179081.

It is not a de Polignac number, because 18097131 - 2⁷ = 18097003 is a prime.

It is a super-2 number, since 2×18097131² = 655012300862322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18097111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6870 + ... + 9131.

It is an arithmetic number, because the mean of its divisors is an integer number (1680210).

Almost surely, 2^18097131 is an apocalyptic number.

18097131 is a deficient number, since it is larger than the sum of its proper divisors (8786229).

18097131 is a wasteful number, since it uses less digits than its factorization.

18097131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16046.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 18097131 is about 4254.0722842942. The cubic root of 18097131 is about 262.5446926171.

The spelling of 18097131 in words is "eighteen million, ninety-seven thousand, one hundred thirty-one".