18326923 has 4 divisors (see below), whose sum is σ = 18672768. Its totient is φ = 17981080.

The previous prime is 18326911. The next prime is 18326977. The reversal of 18326923 is 32962381.

It is a happy number.

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 18326923 - 2⁹ = 18326411 is a prime.

It is a super-2 number, since 2×18326923² = 671752213295858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18326123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172843 + ... + 172948.

It is an arithmetic number, because the mean of its divisors is an integer number (4668192).

Almost surely, 2^18326923 is an apocalyptic number.

18326923 is a deficient number, since it is larger than the sum of its proper divisors (345845).

18326923 is an equidigital number, since it uses as much as digits as its factorization.

18326923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345844.

The product of its digits is 15552, while the sum is 34.

The square root of 18326923 is about 4280.9955617823. The cubic root of 18326923 is about 263.6512603300.

The spelling of 18326923 in words is "eighteen million, three hundred twenty-six thousand, nine hundred twenty-three".