204400404442 has 16 divisors (see below), whose sum is σ = 330195016872. Its totient is φ = 94335863040.

The previous prime is 204400404431. The next prime is 204400404449. The reversal of 204400404442 is 244404004402.

It can be written as a sum of positive squares in 4 ways, for example, as 117888535801 + 86511868641 = 343349^2 + 294129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204400404442.

It is not an unprimeable number, because it can be changed into a prime (204400404449) 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, 975142 + ... + 1166062.

Almost surely, 2^204400404442 is an apocalyptic number.

204400404442 is a deficient number, since it is larger than the sum of its proper divisors (125794612430).

204400404442 is a wasteful number, since it uses less digits than its factorization.

204400404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232113.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 204400404442 its reverse (244404004402), we get a palindrome (448804408844).

The spelling of 204400404442 in words is "two hundred four billion, four hundred million, four hundred four thousand, four hundred forty-two".