2004668813 has 16 divisors (see below), whose sum is σ = 2325586560. Its totient is φ = 1692570816.

The previous prime is 2004668791. The next prime is 2004668821. The reversal of 2004668813 is 3188664002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2004668813 - 2⁶ = 2004668749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004662813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124406 + ... + 139592.

It is an arithmetic number, because the mean of its divisors is an integer number (145349160).

Almost surely, 2^2004668813 is an apocalyptic number.

It is an amenable number.

2004668813 is a deficient number, since it is larger than the sum of its proper divisors (320917747).

2004668813 is a wasteful number, since it uses less digits than its factorization.

2004668813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15476.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 2004668813 is about 44773.5280383398. The cubic root of 2004668813 is about 1260.9006773031.

The spelling of 2004668813 in words is "two billion, four million, six hundred sixty-eight thousand, eight hundred thirteen".