13216636 has 12 divisors (see below), whose sum is σ = 23312128. Its totient is φ = 6556032.

The previous prime is 13216631. The next prime is 13216639. The reversal of 13216636 is 63661231.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12501 + ... + 13516.

Almost surely, 2^13216636 is an apocalyptic number.

It is an amenable number.

13216636 is a deficient number, since it is larger than the sum of its proper divisors (10095492).

13216636 is a wasteful number, since it uses less digits than its factorization.

13216636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26148 (or 26146 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 13216636 is about 3635.4691581693. The cubic root of 13216636 is about 236.4323922085.

Adding to 13216636 its reverse (63661231), we get a palindrome (76877867).

The spelling of 13216636 in words is "thirteen million, two hundred sixteen thousand, six hundred thirty-six".