22020343021 has 4 divisors (see below), whose sum is σ = 22026434652. Its totient is φ = 22014251392.

The previous prime is 22020343019. The next prime is 22020343073. The reversal of 22020343021 is 12034302022.

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 10331706025 + 11688636996 = 101645^2 + 108114^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020343021 - 2¹ = 22020343019 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 22020343021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020343621) 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, 3040390 + ... + 3047623.

It is an arithmetic number, because the mean of its divisors is an integer number (5506608663).

Almost surely, 2^22020343021 is an apocalyptic number.

It is an amenable number.

22020343021 is a deficient number, since it is larger than the sum of its proper divisors (6091631).

22020343021 is an equidigital number, since it uses as much as digits as its factorization.

22020343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091630.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 22020343021 its reverse (12034302022), we get a palindrome (34054645043).

The spelling of 22020343021 in words is "twenty-two billion, twenty million, three hundred forty-three thousand, twenty-one".