18345923 has 4 divisors (see below), whose sum is σ = 18469200. Its totient is φ = 18222648.

The previous prime is 18345911. The next prime is 18345931. The reversal of 18345923 is 32954381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18345923 - 2⁸ = 18345667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18345953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61415 + ... + 61712.

It is an arithmetic number, because the mean of its divisors is an integer number (4617300).

Almost surely, 2^18345923 is an apocalyptic number.

18345923 is a deficient number, since it is larger than the sum of its proper divisors (123277).

18345923 is a wasteful number, since it uses less digits than its factorization.

18345923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123276.

The product of its digits is 25920, while the sum is 35.

The square root of 18345923 is about 4283.2140969137. The cubic root of 18345923 is about 263.7423402461.

The spelling of 18345923 in words is "eighteen million, three hundred forty-five thousand, nine hundred twenty-three".