22020210665 has 4 divisors (see below), whose sum is σ = 26424252804. Its totient is φ = 17616168528.

The previous prime is 22020210647. The next prime is 22020210703. The reversal of 22020210665 is 56601202022.

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 4442489104 + 17577721561 = 66652^2 + 132581^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020210665 - 2⁶ = 22020210601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202021062 + ... + 2202021071.

It is an arithmetic number, because the mean of its divisors is an integer number (6606063201).

Almost surely, 2^22020210665 is an apocalyptic number.

It is an amenable number.

22020210665 is a deficient number, since it is larger than the sum of its proper divisors (4404042139).

22020210665 is an equidigital number, since it uses as much as digits as its factorization.

22020210665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404042138.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 22020210665 its reverse (56601202022), we get a palindrome (78621412687).

The spelling of 22020210665 in words is "twenty-two billion, twenty million, two hundred ten thousand, six hundred sixty-five".