18236316 has 48 divisors (see below), whose sum is σ = 49441280. Its totient is φ = 5123520.

The previous prime is 18236269. The next prime is 18236321. The reversal of 18236316 is 61363281.

18236316 is nontrivially palindromic in base 11.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3345 + ... + 6903.

Almost surely, 2^18236316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18236316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24720640).

18236316 is an abundant number, since it is smaller than the sum of its proper divisors (31204964).

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

18236316 is a wasteful number, since it uses less digits than its factorization.

18236316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634 (or 3632 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 18236316 is about 4270.3999812664. The cubic root of 18236316 is about 263.2160513180.

Adding to 18236316 its reverse (61363281), we get a palindrome (79599597).

The spelling of 18236316 in words is "eighteen million, two hundred thirty-six thousand, three hundred sixteen".