18116236 has 24 divisors (see below), whose sum is σ = 32888240. Its totient is φ = 8724672.

The previous prime is 18116227. The next prime is 18116239. The reversal of 18116236 is 63261181.

It is not an unprimeable number, because it can be changed into a prime (18116239) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15571 + ... + 16693.

Almost surely, 2^18116236 is an apocalyptic number.

It is an amenable number.

18116236 is a deficient number, since it is larger than the sum of its proper divisors (14772004).

18116236 is a wasteful number, since it uses less digits than its factorization.

18116236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1271 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 18116236 is about 4256.3171874286. The cubic root of 18116236 is about 262.6370489193.

The spelling of 18116236 in words is "eighteen million, one hundred sixteen thousand, two hundred thirty-six".