18058938 has 16 divisors (see below), whose sum is σ = 37363680. Its totient is φ = 5812016.

The previous prime is 18058927. The next prime is 18058961. The reversal of 18058938 is 83985081.

It is a super-2 number, since 2×18058938² = 652250483375688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18058938.

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, 51720 + ... + 52067.

It is an arithmetic number, because the mean of its divisors is an integer number (2335230).

Almost surely, 2^18058938 is an apocalyptic number.

18058938 is an abundant number, since it is smaller than the sum of its proper divisors (19304742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18058938 is a wasteful number, since it uses less digits than its factorization.

18058938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103821.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 18058938 is about 4249.5809205144. The cubic root of 18058938 is about 262.3598671550.

The spelling of 18058938 in words is "eighteen million, fifty-eight thousand, nine hundred thirty-eight".