30633813 has 24 divisors (see below), whose sum is σ = 53546688. Its totient is φ = 16474752.

The previous prime is 30633809. The next prime is 30633821. The reversal of 30633813 is 31833603.

It is not a de Polignac number, because 30633813 - 2² = 30633809 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30633853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13231 + ... + 15372.

It is an arithmetic number, because the mean of its divisors is an integer number (2231112).

Almost surely, 2^30633813 is an apocalyptic number.

It is an amenable number.

30633813 is a deficient number, since it is larger than the sum of its proper divisors (22912875).

30633813 is a wasteful number, since it uses less digits than its factorization.

30633813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28633 (or 28630 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 30633813 is about 5534.7821095324. The cubic root of 30633813 is about 312.8962457268.

The spelling of 30633813 in words is "thirty million, six hundred thirty-three thousand, eight hundred thirteen".