204137320 has 16 divisors (see below), whose sum is σ = 459309060. Its totient is φ = 81654912.

The previous prime is 204137303. The next prime is 204137321. The reversal of 204137320 is 23731402.

It can be written as a sum of positive squares in 2 ways, for example, as 204089796 + 47524 = 14286^2 + 218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204137291 and 204137300.

It is not an unprimeable number, because it can be changed into a prime (204137321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2551677 + ... + 2551756.

Almost surely, 2^204137320 is an apocalyptic number.

204137320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204137320 is an abundant number, since it is smaller than the sum of its proper divisors (255171740).

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

204137320 is a wasteful number, since it uses less digits than its factorization.

204137320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103444 (or 5103440 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 204137320 is about 14287.6632099164. The cubic root of 204137320 is about 588.8085887634.

Adding to 204137320 its reverse (23731402), we get a palindrome (227868722).

The spelling of 204137320 in words is "two hundred four million, one hundred thirty-seven thousand, three hundred twenty".