20404200400204 has 24 divisors (see below), whose sum is σ = 35718784335360. Its totient is φ = 10198833758736.

The previous prime is 20404200400189. The next prime is 20404200400219. The reversal of 20404200400204 is 40200400240402.

It is an interprime number because it is at equal distance from previous prime (20404200400189) and next prime (20404200400219).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 492989199 + ... + 493030585.

It is an arithmetic number, because the mean of its divisors is an integer number (1488282680640).

Almost surely, 2^{20404200400204} is an apocalyptic number.

It is an amenable number.

20404200400204 is a deficient number, since it is larger than the sum of its proper divisors (15314583935156).

20404200400204 is a wasteful number, since it uses less digits than its factorization.

20404200400204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77877 (or 77875 counting only the distinct ones).

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

Adding to 20404200400204 its reverse (40200400240402), we get a palindrome (60604600640606).

The spelling of 20404200400204 in words is "twenty trillion, four hundred four billion, two hundred million, four hundred thousand, two hundred four".