20311204404 has 24 divisors (see below), whose sum is σ = 48169743328. Its totient is φ = 6659411040.

The previous prime is 20311204399. The next prime is 20311204423. The reversal of 20311204404 is 40440211302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13873042 + ... + 13874505.

Almost surely, 2^20311204404 is an apocalyptic number.

It is an amenable number.

20311204404 is an abundant number, since it is smaller than the sum of its proper divisors (27858538924).

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

20311204404 is a wasteful number, since it uses less digits than its factorization.

20311204404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27747615 (or 27747613 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20311204404 its reverse (40440211302), we get a palindrome (60751415706).

The spelling of 20311204404 in words is "twenty billion, three hundred eleven million, two hundred four thousand, four hundred four".