18508930 has 16 divisors (see below), whose sum is σ = 36345024. Its totient is φ = 6730480.

The previous prime is 18508927. The next prime is 18508939. The reversal of 18508930 is 3980581.

It is not an unprimeable number, because it can be changed into a prime (18508939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84022 + ... + 84241.

It is an arithmetic number, because the mean of its divisors is an integer number (2271564).

Almost surely, 2^18508930 is an apocalyptic number.

18508930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18508930 is a deficient number, since it is larger than the sum of its proper divisors (17836094).

18508930 is a wasteful number, since it uses less digits than its factorization.

18508930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168281.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18508930 is about 4302.2005996931. The cubic root of 18508930 is about 264.5211716382.

The spelling of 18508930 in words is "eighteen million, five hundred eight thousand, nine hundred thirty".