18336229 has 4 divisors (see below), whose sum is σ = 18365920. Its totient is φ = 18306540.

The previous prime is 18336209. The next prime is 18336257. The reversal of 18336229 is 92263381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18336229 - 2⁹ = 18335717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18336194 and 18336203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18336209) 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, 13899 + ... + 15160.

It is an arithmetic number, because the mean of its divisors is an integer number (4591480).

Almost surely, 2^18336229 is an apocalyptic number.

It is an amenable number.

18336229 is a deficient number, since it is larger than the sum of its proper divisors (29691).

18336229 is an equidigital number, since it uses as much as digits as its factorization.

18336229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29690.

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

The square root of 18336229 is about 4282.0823205539. The cubic root of 18336229 is about 263.6958781756.

The spelling of 18336229 in words is "eighteen million, three hundred thirty-six thousand, two hundred twenty-nine".