18326023 has 4 divisors (see below), whose sum is σ = 18584208. Its totient is φ = 18067840.

The previous prime is 18325987. The next prime is 18326027. The reversal of 18326023 is 32062381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18326023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18326027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128986 + ... + 129127.

It is an arithmetic number, because the mean of its divisors is an integer number (4646052).

Almost surely, 2^18326023 is an apocalyptic number.

18326023 is a deficient number, since it is larger than the sum of its proper divisors (258185).

18326023 is an equidigital number, since it uses as much as digits as its factorization.

18326023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258184.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 18326023 is about 4280.8904447556. The cubic root of 18326023 is about 263.6469444570.

It can be divided in two parts, 18 and 326023, that added together give a square (326041 = 571²).

The spelling of 18326023 in words is "eighteen million, three hundred twenty-six thousand, twenty-three".