18406132 has 12 divisors (see below), whose sum is σ = 32284420. Its totient is φ = 9182016.

The previous prime is 18406109. The next prime is 18406153. The reversal of 18406132 is 23160481.

It can be written as a sum of positive squares in 2 ways, for example, as 10588516 + 7817616 = 3254^2 + 2796^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18406097 and 18406106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3207 + ... + 6862.

Almost surely, 2^18406132 is an apocalyptic number.

It is an amenable number.

18406132 is a deficient number, since it is larger than the sum of its proper divisors (13878288).

18406132 is a wasteful number, since it uses less digits than its factorization.

18406132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530 (or 10528 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18406132 is about 4290.2368233001. The cubic root of 18406132 is about 264.0305481945.

The spelling of 18406132 in words is "eighteen million, four hundred six thousand, one hundred thirty-two".