20321422132205 has 4 divisors (see below), whose sum is σ = 24385706558652. Its totient is φ = 16257137705760.

The previous prime is 20321422132189. The next prime is 20321422132217. The reversal of 20321422132205 is 50223122412302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7491371539369 + 12830050592836 = 2737037^2 + 3581906^2 .

It is not a de Polignac number, because 20321422132205 - 2⁴ = 20321422132189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032142213216 + ... + 2032142213225.

It is an arithmetic number, because the mean of its divisors is an integer number (6096426639663).

Almost surely, 2^{20321422132205} is an apocalyptic number.

It is an amenable number.

20321422132205 is a deficient number, since it is larger than the sum of its proper divisors (4064284426447).

20321422132205 is an equidigital number, since it uses as much as digits as its factorization.

20321422132205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064284426446.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20321422132205 its reverse (50223122412302), we get a palindrome (70544544544507).

The spelling of 20321422132205 in words is "twenty trillion, three hundred twenty-one billion, four hundred twenty-two million, one hundred thirty-two thousand, two hundred five".