18385929 has 12 divisors (see below), whose sum is σ = 27275716. Its totient is φ = 11925792.

The previous prime is 18385919. The next prime is 18385931. The reversal of 18385929 is 92958381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14175225 + 4210704 = 3765^2 + 2052^2 .

It is not a de Polignac number, because 18385929 - 2⁹ = 18385417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18385909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27274 + ... + 27939.

Almost surely, 2^18385929 is an apocalyptic number.

It is an amenable number.

18385929 is a deficient number, since it is larger than the sum of its proper divisors (8889787).

18385929 is a wasteful number, since it uses less digits than its factorization.

18385929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55256 (or 55253 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 18385929 is about 4287.8816448218. The cubic root of 18385929 is about 263.9339107983.

The spelling of 18385929 in words is "eighteen million, three hundred eighty-five thousand, nine hundred twenty-nine".