20400220204 has 48 divisors (see below), whose sum is σ = 44193054528. Its totient is φ = 8023742208.

The previous prime is 20400220193. The next prime is 20400220213. The reversal of 20400220204 is 40202200402.

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 15 ways as a sum of consecutive naturals, for example, 99007 + ... + 224950.

It is an arithmetic number, because the mean of its divisors is an integer number (920688636).

Almost surely, 2^20400220204 is an apocalyptic number.

It is an amenable number.

20400220204 is an abundant number, since it is smaller than the sum of its proper divisors (23792834324).

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

20400220204 is a wasteful number, since it uses less digits than its factorization.

20400220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324154 (or 324152 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20400220204 its reverse (40202200402), we get a palindrome (60602420606).

The spelling of 20400220204 in words is "twenty billion, four hundred million, two hundred twenty thousand, two hundred four".