18000930 has 32 divisors (see below), whose sum is σ = 43473024. Its totient is φ = 4770176.

The previous prime is 18000919. The next prime is 18000937. The reversal of 18000930 is 3900081.

It is a junction number, because it is equal to n+sod(n) for n = 18000897 and 18000906.

It is not an unprimeable number, because it can be changed into a prime (18000937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3214 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (1358532).

Almost surely, 2^18000930 is an apocalyptic number.

18000930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18000930 is an abundant number, since it is smaller than the sum of its proper divisors (25472094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18000930 is a wasteful number, since it uses less digits than its factorization.

18000930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 18000930 is about 4242.7502872547. The cubic root of 18000930 is about 262.0786528422.

The spelling of 18000930 in words is "eighteen million, nine hundred thirty", and thus it is an aban number.