204504340 has 24 divisors (see below), whose sum is σ = 431625600. Its totient is φ = 81389088.

The previous prime is 204504323. The next prime is 204504341. The reversal of 204504340 is 43405402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204504341) 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, 21712 + ... + 29671.

It is an arithmetic number, because the mean of its divisors is an integer number (17984400).

Almost surely, 2^204504340 is an apocalyptic number.

204504340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204504340 is an abundant number, since it is smaller than the sum of its proper divisors (227121260).

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

204504340 is a wasteful number, since it uses less digits than its factorization.

204504340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51591 (or 51589 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 204504340 is about 14300.5013898115. The cubic root of 204504340 is about 589.1612519372.

Adding to 204504340 its reverse (43405402), we get a palindrome (247909742).

The spelling of 204504340 in words is "two hundred four million, five hundred four thousand, three hundred forty".