20022412243421 has 6 divisors (see below), whose sum is σ = 23291377507710. Its totient is φ = 17162067637176.

The previous prime is 20022412243403. The next prime is 20022412243447. The reversal of 20022412243421 is 12434221422002.

It can be written as a sum of positive squares in only one way, i.e., 11633215562500 + 8389196680921 = 3410750^2 + 2896411^2 .

It is not a de Polignac number, because 20022412243421 - 2²² = 20022408049117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022412243451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204310328966 + ... + 204310329063.

It is an arithmetic number, because the mean of its divisors is an integer number (3881896251285).

Almost surely, 2^{20022412243421} is an apocalyptic number.

It is an amenable number.

20022412243421 is a deficient number, since it is larger than the sum of its proper divisors (3268965264289).

20022412243421 is an equidigital number, since it uses as much as digits as its factorization.

20022412243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408620658043 (or 408620658036 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20022412243421 its reverse (12434221422002), we get a palindrome (32456633665423).

The spelling of 20022412243421 in words is "twenty trillion, twenty-two billion, four hundred twelve million, two hundred forty-three thousand, four hundred twenty-one".