18158930 has 16 divisors (see below), whose sum is σ = 33813720. Its totient is φ = 7012992.

The previous prime is 18158929. The next prime is 18158951. The reversal of 18158930 is 3985181.

It can be written as a sum of positive squares in 4 ways, for example, as 9296401 + 8862529 = 3049^2 + 2977^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31019 + ... + 31598.

Almost surely, 2^18158930 is an apocalyptic number.

18158930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18158930 is a deficient number, since it is larger than the sum of its proper divisors (15654790).

18158930 is a wasteful number, since it uses less digits than its factorization.

18158930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62653.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 18158930 is about 4261.3296047126. The cubic root of 18158930 is about 262.8432033915.

The spelling of 18158930 in words is "eighteen million, one hundred fifty-eight thousand, nine hundred thirty".