204434320 has 20 divisors (see below), whose sum is σ = 475309980. Its totient is φ = 81773696.

The previous prime is 204434317. The next prime is 204434339. The reversal of 204434320 is 23434402.

204434320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 79352464 + 125081856 = 8908^2 + 11184^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 204434291 and 204434300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277635 + ... + 1277794.

It is an arithmetic number, because the mean of its divisors is an integer number (23765499).

Almost surely, 2^204434320 is an apocalyptic number.

204434320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204434320 is an abundant number, since it is smaller than the sum of its proper divisors (270875660).

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

204434320 is a wasteful number, since it uses less digits than its factorization.

204434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555442 (or 2555436 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 204434320 is about 14298.0530143093. The cubic root of 204434320 is about 589.0940035193.

Adding to 204434320 its reverse (23434402), we get a palindrome (227868722).

The spelling of 204434320 in words is "two hundred four million, four hundred thirty-four thousand, three hundred twenty".