18058994 has 4 divisors (see below), whose sum is σ = 27088494. Its totient is φ = 9029496.

The previous prime is 18058991. The next prime is 18059021. The reversal of 18058994 is 49985081.

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

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 877969 = 4145^2 + 937^2 .

It is a super-2 number, since 2×18058994² = 652254528584072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18058991) 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 as a sum of consecutive naturals, namely, 4514747 + ... + 4514750.

Almost surely, 2^18058994 is an apocalyptic number.

18058994 is a deficient number, since it is larger than the sum of its proper divisors (9029500).

18058994 is an equidigital number, since it uses as much as digits as its factorization.

18058994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029499.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18058994 is about 4249.5875093943. The cubic root of 18058994 is about 262.3601383436.

The spelling of 18058994 in words is "eighteen million, fifty-eight thousand, nine hundred ninety-four".