18136312 has 16 divisors (see below), whose sum is σ = 34071840. Its totient is φ = 9050496.

The previous prime is 18136277. The next prime is 18136319. The reversal of 18136312 is 21363181.

It is a super-2 number, since 2×18136312² = 657851625922688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18136319) 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 3 ways as a sum of consecutive naturals, for example, 2833 + ... + 6655.

It is an arithmetic number, because the mean of its divisors is an integer number (2129490).

Almost surely, 2^18136312 is an apocalyptic number.

It is an amenable number.

18136312 is a deficient number, since it is larger than the sum of its proper divisors (15935528).

18136312 is a wasteful number, since it uses less digits than its factorization.

18136312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4418 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 18136312 is about 4258.6749112840. The cubic root of 18136312 is about 262.7340292356.

Adding to 18136312 its reverse (21363181), we get a palindrome (39499493).

The spelling of 18136312 in words is "eighteen million, one hundred thirty-six thousand, three hundred twelve".