18385930 has 16 divisors (see below), whose sum is σ = 33799680. Its totient is φ = 7197712.

The previous prime is 18385919. The next prime is 18385931. The reversal of 18385930 is 3958381.

It is a self number, because there is not a number n which added to its sum of digits gives 18385930.

It is not an unprimeable number, because it can be changed into a prime (18385931) 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, 19090 + ... + 20029.

It is an arithmetic number, because the mean of its divisors is an integer number (2112480).

Almost surely, 2^18385930 is an apocalyptic number.

18385930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18385930 is a deficient number, since it is larger than the sum of its proper divisors (15413750).

18385930 is a wasteful number, since it uses less digits than its factorization.

18385930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39173.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 18385930 is about 4287.8817614295. The cubic root of 18385930 is about 263.9339155834.

The spelling of 18385930 in words is "eighteen million, three hundred eighty-five thousand, nine hundred thirty".