12636918 has 64 divisors (see below), whose sum is σ = 32509440. Its totient is φ = 3564000.

The previous prime is 12636893. The next prime is 12636931. The reversal of 12636918 is 81963621.

12636918 is a `hidden beast` number, since 1 + 2 + 636 + 9 + 18 = 666.

12636918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38013 + ... + 38343.

It is an arithmetic number, because the mean of its divisors is an integer number (507960).

Almost surely, 2^12636918 is an apocalyptic number.

12636918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12636918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16254720).

12636918 is an abundant number, since it is smaller than the sum of its proper divisors (19872522).

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

12636918 is a wasteful number, since it uses less digits than its factorization.

12636918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12636918 is about 3554.8443003879. The cubic root of 12636918 is about 232.9237226295.

The spelling of 12636918 in words is "twelve million, six hundred thirty-six thousand, nine hundred eighteen".