133813636 has 24 divisors (see below), whose sum is σ = 258340320. Its totient is φ = 60139200.

The previous prime is 133813619. The next prime is 133813651. The reversal of 133813636 is 636318331.

133813636 is digitally balanced in base 3, 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 in 7 ways as a sum of consecutive naturals, for example, 13170 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (10764180).

Almost surely, 2^133813636 is an apocalyptic number.

It is an amenable number.

133813636 is a deficient number, since it is larger than the sum of its proper divisors (124526684).

133813636 is a wasteful number, since it uses less digits than its factorization.

133813636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34275 (or 34273 counting only the distinct ones).

The product of its digits is 23328, while the sum is 34.

The square root of 133813636 is about 11567.7844032468. The cubic root of 133813636 is about 511.4856539210.

The spelling of 133813636 in words is "one hundred thirty-three million, eight hundred thirteen thousand, six hundred thirty-six".