204261520220 has 48 divisors (see below), whose sum is σ = 435109848768. Its totient is φ = 80531781120.

The previous prime is 204261520219. The next prime is 204261520261. The reversal of 204261520220 is 22025162402.

It is a self number, because there is not a number n which added to its sum of digits gives 204261520220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5766002 + ... + 5801318.

It is an arithmetic number, because the mean of its divisors is an integer number (9064788516).

Almost surely, 2^204261520220 is an apocalyptic number.

204261520220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204261520220 is an abundant number, since it is smaller than the sum of its proper divisors (230848328548).

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

204261520220 is a wasteful number, since it uses less digits than its factorization.

204261520220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39470 (or 39468 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 204261520220 its reverse (22025162402), we get a palindrome (226286682622).

The spelling of 204261520220 in words is "two hundred four billion, two hundred sixty-one million, five hundred twenty thousand, two hundred twenty".