204042220420 has 24 divisors (see below), whose sum is σ = 428554645848. Its totient is φ = 81604320000.

The previous prime is 204042220411. The next prime is 204042220451. The reversal of 204042220420 is 24022240402.

It is a happy number.

204042220420 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 4 ways, for example, as 21111508804 + 182930711616 = 145298^2 + 427704^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204042220391 and 204042220400.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 651831 + ... + 912670.

It is an arithmetic number, because the mean of its divisors is an integer number (17856443577).

Almost surely, 2^204042220420 is an apocalyptic number.

204042220420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204042220420 is an abundant number, since it is smaller than the sum of its proper divisors (224512425428).

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

204042220420 is a wasteful number, since it uses less digits than its factorization.

204042220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571031 (or 1571029 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 204042220420 its reverse (24022240402), we get a palindrome (228064460822).

The spelling of 204042220420 in words is "two hundred four billion, forty-two million, two hundred twenty thousand, four hundred twenty".