20222172205 has 4 divisors (see below), whose sum is σ = 24266606652. Its totient is φ = 16177737760.

The previous prime is 20222172199. The next prime is 20222172209. The reversal of 20222172205 is 50227122202.

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 11496557284 + 8725614921 = 107222^2 + 93411^2 .

It is not a de Polignac number, because 20222172205 - 2⁷ = 20222172077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20222172205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222172209) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2022217216 + ... + 2022217225.

It is an arithmetic number, because the mean of its divisors is an integer number (6066651663).

Almost surely, 2^20222172205 is an apocalyptic number.

It is an amenable number.

20222172205 is a deficient number, since it is larger than the sum of its proper divisors (4044434447).

20222172205 is an equidigital number, since it uses as much as digits as its factorization.

20222172205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044434446.

The product of its (nonzero) digits is 2240, while the sum is 25.

Adding to 20222172205 its reverse (50227122202), we get a palindrome (70449294407).

The spelling of 20222172205 in words is "twenty billion, two hundred twenty-two million, one hundred seventy-two thousand, two hundred five".