18082331 has 4 divisors (see below), whose sum is σ = 18665664. Its totient is φ = 17499000.

The previous prime is 18082327. The next prime is 18082343. The reversal of 18082331 is 13328081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18082331 - 2² = 18082327 is a prime.

It is a super-2 number, since 2×18082331² = 653941388787122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18082331.

It is not an unprimeable number, because it can be changed into a prime (18082321) by changing a digit.

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, 291620 + ... + 291681.

It is an arithmetic number, because the mean of its divisors is an integer number (4666416).

Almost surely, 2^18082331 is an apocalyptic number.

18082331 is a deficient number, since it is larger than the sum of its proper divisors (583333).

18082331 is an equidigital number, since it uses as much as digits as its factorization.

18082331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583332.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18082331 is about 4252.3324188027. The cubic root of 18082331 is about 262.4731026106.

The spelling of 18082331 in words is "eighteen million, eighty-two thousand, three hundred thirty-one".