204020320 has 144 divisors (see below), whose sum is σ = 572434128. Its totient is φ = 68490240.

The previous prime is 204020291. The next prime is 204020329. The reversal of 204020320 is 23020402.

It is a self number, because there is not a number n which added to its sum of digits gives 204020320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204020329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 415275 + ... + 415765.

It is an arithmetic number, because the mean of its divisors is an integer number (3975237).

Almost surely, 2^204020320 is an apocalyptic number.

204020320 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 204020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286217064).

204020320 is an abundant number, since it is smaller than the sum of its proper divisors (368413808).

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

204020320 is a wasteful number, since it uses less digits than its factorization.

204020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 204020320 is about 14283.5681816555. The cubic root of 204020320 is about 588.6960766393.

Adding to 204020320 its reverse (23020402), we get a palindrome (227040722).

It can be divided in two parts, 204020 and 320, that multiplied together give a square (65286400 = 8080²).

The spelling of 204020320 in words is "two hundred four million, twenty thousand, three hundred twenty".