204504320120 has 64 divisors (see below), whose sum is σ = 470763619200. Its totient is φ = 79933501440.

The previous prime is 204504320051. The next prime is 204504320129. The reversal of 204504320120 is 21023405402.

It is a happy number.

204504320120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204504320129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27071 + ... + 640110.

It is an arithmetic number, because the mean of its divisors is an integer number (7355681550).

Almost surely, 2^204504320120 is an apocalyptic number.

204504320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204504320120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235381809600).

204504320120 is an abundant number, since it is smaller than the sum of its proper divisors (266259299080).

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

204504320120 is a wasteful number, since it uses less digits than its factorization.

204504320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667368 (or 667364 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 204504320120 its reverse (21023405402), we get a palindrome (225527725522).

The spelling of 204504320120 in words is "two hundred four billion, five hundred four million, three hundred twenty thousand, one hundred twenty".