18325321 has 8 divisors (see below), whose sum is σ = 21196224. Its totient is φ = 15517680.

The previous prime is 18325301. The next prime is 18325327. The reversal of 18325321 is 12352381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18325321 - 2¹⁷ = 18194249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18325327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15190 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (2649528).

Almost surely, 2^18325321 is an apocalyptic number.

It is an amenable number.

18325321 is a deficient number, since it is larger than the sum of its proper divisors (2870903).

18325321 is an equidigital number, since it uses as much as digits as its factorization.

18325321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31631.

The product of its digits is 1440, while the sum is 25.

The square root of 18325321 is about 4280.8084516829. The cubic root of 18325321 is about 263.6435779779.

The spelling of 18325321 in words is "eighteen million, three hundred twenty-five thousand, three hundred twenty-one".