204044013 has 12 divisors (see below), whose sum is σ = 312067548. Its totient is φ = 128027520.

The previous prime is 204043999. The next prime is 204044023. The reversal of 204044013 is 310440402.

It can be written as a sum of positive squares in 2 ways, for example, as 77211369 + 126832644 = 8787^2 + 11262^2 .

It is not a de Polignac number, because 204044013 - 2⁶ = 204043949 is a prime.

It is a super-2 number, since 2×204044013² = 83267918482288338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204044023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 666658 + ... + 666963.

It is an arithmetic number, because the mean of its divisors is an integer number (26005629).

Almost surely, 2^204044013 is an apocalyptic number.

It is an amenable number.

204044013 is a deficient number, since it is larger than the sum of its proper divisors (108023535).

204044013 is a wasteful number, since it uses less digits than its factorization.

204044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333644 (or 1333641 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204044013 is about 14284.3975371732. The cubic root of 204044013 is about 588.7188642980.

Adding to 204044013 its reverse (310440402), we get a palindrome (514484415).

The spelling of 204044013 in words is "two hundred four million, forty-four thousand, thirteen".