18442323 has 20 divisors (see below), whose sum is σ = 27700288. Its totient is φ = 12227760.

The previous prime is 18442247. The next prime is 18442337. The reversal of 18442323 is 32324481.

It is not a de Polignac number, because 18442323 - 2⁹ = 18441811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18442373) 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 19 ways as a sum of consecutive naturals, for example, 17553 + ... + 18573.

Almost surely, 2^18442323 is an apocalyptic number.

18442323 is a deficient number, since it is larger than the sum of its proper divisors (9257965).

18442323 is a wasteful number, since it uses less digits than its factorization.

18442323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1247 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 18442323 is about 4294.4525844396. The cubic root of 18442323 is about 264.2034846477.

The spelling of 18442323 in words is "eighteen million, four hundred forty-two thousand, three hundred twenty-three".