20204404401 has 4 divisors (see below), whose sum is σ = 26939205872. Its totient is φ = 13469602932.

The previous prime is 20204404393. The next prime is 20204404421. The reversal of 20204404401 is 10440440202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20204404401 - 2³ = 20204404393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204404421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367400731 + ... + 3367400736.

It is an arithmetic number, because the mean of its divisors is an integer number (6734801468).

Almost surely, 2^20204404401 is an apocalyptic number.

It is an amenable number.

20204404401 is a deficient number, since it is larger than the sum of its proper divisors (6734801471).

20204404401 is an equidigital number, since it uses as much as digits as its factorization.

20204404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734801470.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20204404401 its reverse (10440440202), we get a palindrome (30644844603).

The spelling of 20204404401 in words is "twenty billion, two hundred four million, four hundred four thousand, four hundred one".