18082390 has 16 divisors (see below), whose sum is σ = 34463232. Its totient is φ = 6807424.

The previous prime is 18082369. The next prime is 18082411. The reversal of 18082390 is 9328081.

It is an interprime number because it is at equal distance from previous prime (18082369) and next prime (18082411).

It is a super-2 number, since 2×18082390² = 653945656224200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 53014 + ... + 53353.

It is an arithmetic number, because the mean of its divisors is an integer number (2153952).

Almost surely, 2^18082390 is an apocalyptic number.

18082390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18082390 is a deficient number, since it is larger than the sum of its proper divisors (16380842).

18082390 is a wasteful number, since it uses less digits than its factorization.

18082390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106391.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18082390 is about 4252.3393561662. The cubic root of 18082390 is about 262.4733880807.

The spelling of 18082390 in words is "eighteen million, eighty-two thousand, three hundred ninety".