204640600020 has 24 divisors (see below), whose sum is σ = 572993680224. Its totient is φ = 54570826656.

The previous prime is 204640600009. The next prime is 204640600037. The reversal of 204640600020 is 20006046402.

It is a congruent number.

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, 1705338274 + ... + 1705338393.

It is an arithmetic number, because the mean of its divisors is an integer number (23874736676).

Almost surely, 2^204640600020 is an apocalyptic number.

204640600020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204640600020 is an abundant number, since it is smaller than the sum of its proper divisors (368353080204).

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

204640600020 is a wasteful number, since it uses less digits than its factorization.

204640600020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410676679 (or 3410676677 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 204640600020 its reverse (20006046402), we get a palindrome (224646646422).

The spelling of 204640600020 in words is "two hundred four billion, six hundred forty million, six hundred thousand, twenty".