18130258 has 4 divisors (see below), whose sum is σ = 27195390. Its totient is φ = 9065128.

The previous prime is 18130253. The next prime is 18130291. The reversal of 18130258 is 85203181.

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., 14569489 + 3560769 = 3817^2 + 1887^2 .

It is not an unprimeable number, because it can be changed into a prime (18130253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4532563 + ... + 4532566.

Almost surely, 2^18130258 is an apocalyptic number.

18130258 is a deficient number, since it is larger than the sum of its proper divisors (9065132).

18130258 is an equidigital number, since it uses as much as digits as its factorization.

18130258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9065131.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18130258 is about 4257.9640674858. The cubic root of 18130258 is about 262.7047919642.

The spelling of 18130258 in words is "eighteen million, one hundred thirty thousand, two hundred fifty-eight".