204020340320 has 96 divisors (see below), whose sum is σ = 489037663296. Its totient is φ = 80417433600.

The previous prime is 204020340289. The next prime is 204020340341. The reversal of 204020340320 is 23043020402.

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 = 204020340292 and 204020340301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31770710 + ... + 31777130.

It is an arithmetic number, because the mean of its divisors is an integer number (5094142326).

Almost surely, 2^204020340320 is an apocalyptic number.

204020340320 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 204020340320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244518831648).

204020340320 is an abundant number, since it is smaller than the sum of its proper divisors (285017322976).

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

204020340320 is a wasteful number, since it uses less digits than its factorization.

204020340320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304 (or 9296 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 204020340320 its reverse (23043020402), we get a palindrome (227063360722).

The spelling of 204020340320 in words is "two hundred four billion, twenty million, three hundred forty thousand, three hundred twenty".