18032131 has 6 divisors (see below), whose sum is σ = 19526100. Its totient is φ = 16644888.

The previous prime is 18032123. The next prime is 18032141. The reversal of 18032131 is 13123081.

It is not a de Polignac number, because 18032131 - 2³ = 18032123 is a prime.

It is a super-2 number, since 2×18032131² = 650315496802322, 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 = 18032099 and 18032108.

It is not an unprimeable number, because it can be changed into a prime (18032101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53181 + ... + 53518.

It is an arithmetic number, because the mean of its divisors is an integer number (3254350).

Almost surely, 2^18032131 is an apocalyptic number.

18032131 is a deficient number, since it is larger than the sum of its proper divisors (1493969).

18032131 is a wasteful number, since it uses less digits than its factorization.

18032131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106725 (or 106712 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18032131 is about 4246.4256734341. The cubic root of 18032131 is about 262.2299856924.

The spelling of 18032131 in words is "eighteen million, thirty-two thousand, one hundred thirty-one".