20310230221 has 4 divisors (see below), whose sum is σ = 20351595744. Its totient is φ = 20268864700.

The previous prime is 20310230209. The next prime is 20310230231. The reversal of 20310230221 is 12203201302.

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 a cyclic number.

It is not a de Polignac number, because 20310230221 - 2⁷ = 20310230093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310230195 and 20310230204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310230231) by changing a digit.

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, 20682025 + ... + 20683006.

It is an arithmetic number, because the mean of its divisors is an integer number (5087898936).

Almost surely, 2^20310230221 is an apocalyptic number.

It is an amenable number.

20310230221 is a deficient number, since it is larger than the sum of its proper divisors (41365523).

20310230221 is an equidigital number, since it uses as much as digits as its factorization.

20310230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41365522.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20310230221 its reverse (12203201302), we get a palindrome (32513431523).

The spelling of 20310230221 in words is "twenty billion, three hundred ten million, two hundred thirty thousand, two hundred twenty-one".