18328236 has 24 divisors (see below), whose sum is σ = 45017280. Its totient is φ = 5787792.

The previous prime is 18328231. The next prime is 18328249. The reversal of 18328236 is 63282381.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18328197 and 18328206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39966 + ... + 40421.

It is an arithmetic number, because the mean of its divisors is an integer number (1875720).

Almost surely, 2^18328236 is an apocalyptic number.

It is an amenable number.

18328236 is an abundant number, since it is smaller than the sum of its proper divisors (26689044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18328236 is a wasteful number, since it uses less digits than its factorization.

18328236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80413 (or 80411 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 18328236 is about 4281.1489112153. The cubic root of 18328236 is about 263.6575564558.

The spelling of 18328236 in words is "eighteen million, three hundred twenty-eight thousand, two hundred thirty-six".