204311312044 has 24 divisors (see below), whose sum is σ = 408639264768. Its totient is φ = 87558425040.

The previous prime is 204311312021. The next prime is 204311312047. The reversal of 204311312044 is 440213113402.

It is a super-2 number, since 2×204311312044² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204311312047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621237 + ... + 891379.

It is an arithmetic number, because the mean of its divisors is an integer number (17026636032).

Almost surely, 2^204311312044 is an apocalyptic number.

It is an amenable number.

204311312044 is an abundant number, since it is smaller than the sum of its proper divisors (204327952724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204311312044 is a wasteful number, since it uses less digits than its factorization.

204311312044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297165 (or 297163 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 204311312044 its reverse (440213113402), we get a palindrome (644524425446).

The spelling of 204311312044 in words is "two hundred four billion, three hundred eleven million, three hundred twelve thousand, forty-four".