18332818 has 16 divisors (see below), whose sum is σ = 31944384. Its totient is φ = 7727760.

The previous prime is 18332807. The next prime is 18332827. The reversal of 18332818 is 81823381.

It is a super-2 number, since 2×18332818² = 672184431642248, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 9880 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (1996524).

Almost surely, 2^18332818 is an apocalyptic number.

18332818 is a deficient number, since it is larger than the sum of its proper divisors (13611566).

18332818 is a wasteful number, since it uses less digits than its factorization.

18332818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21537.

The product of its digits is 9216, while the sum is 34.

The square root of 18332818 is about 4281.6840144971. The cubic root of 18332818 is about 263.6795258053.

The spelling of 18332818 in words is "eighteen million, three hundred thirty-two thousand, eight hundred eighteen".