18338023 has 8 divisors (see below), whose sum is σ = 20039040. Its totient is φ = 16642680.

The previous prime is 18338011. The next prime is 18338083. The reversal of 18338023 is 32083381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18338023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18337982 and 18338000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8236 + ... + 10222.

It is an arithmetic number, because the mean of its divisors is an integer number (2504880).

Almost surely, 2^18338023 is an apocalyptic number.

18338023 is a deficient number, since it is larger than the sum of its proper divisors (1701017).

18338023 is a wasteful number, since it uses less digits than its factorization.

18338023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 18338023 is about 4282.2917929539. The cubic root of 18338023 is about 263.7044778169.

The spelling of 18338023 in words is "eighteen million, three hundred thirty-eight thousand, twenty-three".