13563916 has 6 divisors (see below), whose sum is σ = 23736860. Its totient is φ = 6781956.

The previous prime is 13563889. The next prime is 13563937. The reversal of 13563916 is 61936531.

13563916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1695486 + ... + 1695493.

Almost surely, 2^13563916 is an apocalyptic number.

It is an amenable number.

13563916 is a deficient number, since it is larger than the sum of its proper divisors (10172944).

13563916 is a wasteful number, since it uses less digits than its factorization.

13563916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390983 (or 3390981 counting only the distinct ones).

The product of its digits is 14580, while the sum is 34.

The square root of 13563916 is about 3682.9222093332. The cubic root of 13563916 is about 238.4853452899.

The spelling of 13563916 in words is "thirteen million, five hundred sixty-three thousand, nine hundred sixteen".