204122003420 has 12 divisors (see below), whose sum is σ = 428656207224. Its totient is φ = 81648801360.

The previous prime is 204122003419. The next prime is 204122003429. The reversal of 204122003420 is 24300221402.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10206100171 = 204122003420 / (2 + 0 + 4 + 1 + 2 + 2 + 0 + 0 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 204122003392 and 204122003401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204122003429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5103050066 + ... + 5103050105.

It is an arithmetic number, because the mean of its divisors is an integer number (35721350602).

Almost surely, 2^204122003420 is an apocalyptic number.

204122003420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204122003420 is an abundant number, since it is smaller than the sum of its proper divisors (224534203804).

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

204122003420 is a wasteful number, since it uses less digits than its factorization.

204122003420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206100180 (or 10206100178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 204122003420 its reverse (24300221402), we get a palindrome (228422224822).

The spelling of 204122003420 in words is "two hundred four billion, one hundred twenty-two million, three thousand, four hundred twenty".