18336223 has 4 divisors (see below), whose sum is σ = 18438840. Its totient is φ = 18233608.

The previous prime is 18336209. The next prime is 18336257. The reversal of 18336223 is 32263381.

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 18336223 - 2⁹ = 18335711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18336191 and 18336200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18336203) 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, 51040 + ... + 51397.

It is an arithmetic number, because the mean of its divisors is an integer number (4609710).

Almost surely, 2^18336223 is an apocalyptic number.

18336223 is a deficient number, since it is larger than the sum of its proper divisors (102617).

18336223 is a wasteful number, since it uses less digits than its factorization.

18336223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102616.

The product of its digits is 5184, while the sum is 28.

The square root of 18336223 is about 4282.0816199601. The cubic root of 18336223 is about 263.6958494133.

The spelling of 18336223 in words is "eighteen million, three hundred thirty-six thousand, two hundred twenty-three".