18368930 has 16 divisors (see below), whose sum is σ = 33607224. Its totient is φ = 7226880.

The previous prime is 18368929. The next prime is 18368939. The reversal of 18368930 is 3986381.

It can be written as a sum of positive squares in 4 ways, for example, as 14055001 + 4313929 = 3749^2 + 2077^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18368939) 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, 14447 + ... + 15666.

Almost surely, 2^18368930 is an apocalyptic number.

18368930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18368930 is a deficient number, since it is larger than the sum of its proper divisors (15238294).

18368930 is a wasteful number, since it uses less digits than its factorization.

18368930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30181.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 18368930 is about 4285.8989722111. The cubic root of 18368930 is about 263.8525443000.

The spelling of 18368930 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred thirty".