204021841640 has 16 divisors (see below), whose sum is σ = 459049143780. Its totient is φ = 81608736640.

The previous prime is 204021841631. The next prime is 204021841643. The reversal of 204021841640 is 46148120402.

204021841640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 201908232964 + 2113608676 = 449342^2 + 45974^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204021841597 and 204021841606.

It is not an unprimeable number, because it can be changed into a prime (204021841643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550272981 + ... + 2550273060.

Almost surely, 2^204021841640 is an apocalyptic number.

204021841640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204021841640 is an abundant number, since it is smaller than the sum of its proper divisors (255027302140).

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

204021841640 is a wasteful number, since it uses less digits than its factorization.

204021841640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100546052 (or 5100546048 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The spelling of 204021841640 in words is "two hundred four billion, twenty-one million, eight hundred forty-one thousand, six hundred forty".