204313320 has 128 divisors (see below), whose sum is σ = 686448000. Its totient is φ = 54051840.

The previous prime is 204313313. The next prime is 204313321. The reversal of 204313320 is 23313402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204313293 and 204313302.

It is not an unprimeable number, because it can be changed into a prime (204313321) 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 31 ways as a sum of consecutive naturals, for example, 149440 + ... + 150800.

It is an arithmetic number, because the mean of its divisors is an integer number (5362875).

Almost surely, 2^204313320 is an apocalyptic number.

204313320 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 204313320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343224000).

204313320 is an abundant number, since it is smaller than the sum of its proper divisors (482134680).

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

204313320 is a wasteful number, since it uses less digits than its factorization.

204313320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 204313320 is about 14293.8210426743. The cubic root of 204313320 is about 588.9777568243.

Adding to 204313320 its reverse (23313402), we get a palindrome (227626722).

The spelling of 204313320 in words is "two hundred four million, three hundred thirteen thousand, three hundred twenty".