20322243021 has 4 divisors (see below), whose sum is σ = 27096324032. Its totient is φ = 13548162012.

The previous prime is 20322242999. The next prime is 20322243059. The reversal of 20322243021 is 12034222302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20322243021 - 2⁵ = 20322242989 is a prime.

It is a super-2 number, since 2×20322243021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20322243091) 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, 3387040501 + ... + 3387040506.

It is an arithmetic number, because the mean of its divisors is an integer number (6774081008).

Almost surely, 2^20322243021 is an apocalyptic number.

It is an amenable number.

20322243021 is a deficient number, since it is larger than the sum of its proper divisors (6774081011).

20322243021 is an equidigital number, since it uses as much as digits as its factorization.

20322243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774081010.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20322243021 its reverse (12034222302), we get a palindrome (32356465323).

The spelling of 20322243021 in words is "twenty billion, three hundred twenty-two million, two hundred forty-three thousand, twenty-one".