18445018 has 8 divisors (see below), whose sum is σ = 28415412. Its totient is φ = 8973216.

The previous prime is 18445003. The next prime is 18445027. The reversal of 18445018 is 81054481.

It can be written as a sum of positive squares in 2 ways, for example, as 12766329 + 5678689 = 3573^2 + 2383^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 124555 + ... + 124702.

Almost surely, 2^18445018 is an apocalyptic number.

18445018 is a deficient number, since it is larger than the sum of its proper divisors (9970394).

18445018 is a wasteful number, since it uses less digits than its factorization.

18445018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249296.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 18445018 is about 4294.7663498728. The cubic root of 18445018 is about 264.2163534841.

Adding to 18445018 its reverse (81054481), we get a palindrome (99499499).

The spelling of 18445018 in words is "eighteen million, four hundred forty-five thousand, eighteen".