204134013 has 10 divisors (see below), whose sum is σ = 304941054. Its totient is φ = 136089288.

The previous prime is 204134003. The next prime is 204134053. The reversal of 204134013 is 310431402.

It can be written as a sum of positive squares in only one way, i.e., 117029124 + 87104889 = 10818^2 + 9333^2 .

It is not a de Polignac number, because 204134013 - 2⁴ = 204133997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204134003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1260006 + ... + 1260167.

Almost surely, 2^204134013 is an apocalyptic number.

It is an amenable number.

204134013 is a deficient number, since it is larger than the sum of its proper divisors (100807041).

204134013 is an equidigital number, since it uses as much as digits as its factorization.

204134013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520185 (or 2520176 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 204134013 is about 14287.5474802361. The cubic root of 204134013 is about 588.8054092035.

Adding to 204134013 its reverse (310431402), we get a palindrome (514565415).

The spelling of 204134013 in words is "two hundred four million, one hundred thirty-four thousand, thirteen".