204513320 has 32 divisors (see below), whose sum is σ = 501988320. Its totient is φ = 74368320.

The previous prime is 204513313. The next prime is 204513347. The reversal of 204513320 is 23315402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 204513292 and 204513301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231962 + ... + 232841.

It is an arithmetic number, because the mean of its divisors is an integer number (15687135).

Almost surely, 2^204513320 is an apocalyptic number.

204513320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204513320 is an abundant number, since it is smaller than the sum of its proper divisors (297475000).

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

204513320 is a wasteful number, since it uses less digits than its factorization.

204513320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464825 (or 464821 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 204513320 is about 14300.8153613701. The cubic root of 204513320 is about 589.1698753738.

Adding to 204513320 its reverse (23315402), we get a palindrome (227828722).

The spelling of 204513320 in words is "two hundred four million, five hundred thirteen thousand, three hundred twenty".