204343312013 has 4 divisors (see below), whose sum is σ = 205596952128. Its totient is φ = 203089671900.

The previous prime is 204343311967. The next prime is 204343312027. The reversal of 204343312013 is 310213343402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204343312013 - 2²⁶ = 204276203149 is a prime.

It is a super-2 number, since 2×204343312013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204343312073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626819813 + ... + 626820138.

It is an arithmetic number, because the mean of its divisors is an integer number (51399238032).

Almost surely, 2^204343312013 is an apocalyptic number.

It is an amenable number.

204343312013 is a deficient number, since it is larger than the sum of its proper divisors (1253640115).

204343312013 is a wasteful number, since it uses less digits than its factorization.

204343312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253640114.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 204343312013 its reverse (310213343402), we get a palindrome (514556655415).

The spelling of 204343312013 in words is "two hundred four billion, three hundred forty-three million, three hundred twelve thousand, thirteen".