204042220220 has 24 divisors (see below), whose sum is σ = 429414143424. Its totient is φ = 81440606016.

The previous prime is 204042220201. The next prime is 204042220229. The reversal of 204042220220 is 22022240402.

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 = 204042220192 and 204042220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204042220229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11008139 + ... + 11026658.

It is an arithmetic number, because the mean of its divisors is an integer number (17892255976).

Almost surely, 2^204042220220 is an apocalyptic number.

204042220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204042220220 is an abundant number, since it is smaller than the sum of its proper divisors (225371923204).

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

204042220220 is a wasteful number, since it uses less digits than its factorization.

204042220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22035269 (or 22035267 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 204042220220 its reverse (22022240402), we get a palindrome (226064460622).

The spelling of 204042220220 in words is "two hundred four billion, forty-two million, two hundred twenty thousand, two hundred twenty".