18540332 has 6 divisors (see below), whose sum is σ = 32445588. Its totient is φ = 9270164.

The previous prime is 18540329. The next prime is 18540341. The reversal of 18540332 is 23304581.

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 as a sum of consecutive naturals, namely, 2317538 + ... + 2317545.

It is an arithmetic number, because the mean of its divisors is an integer number (5407598).

Almost surely, 2^18540332 is an apocalyptic number.

It is an amenable number.

18540332 is a deficient number, since it is larger than the sum of its proper divisors (13905256).

18540332 is a wasteful number, since it uses less digits than its factorization.

18540332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635087 (or 4635085 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 18540332 is about 4305.8485807097. The cubic root of 18540332 is about 264.6706814639.

The spelling of 18540332 in words is "eighteen million, five hundred forty thousand, three hundred thirty-two".