20302110021 has 4 divisors (see below), whose sum is σ = 27069480032. Its totient is φ = 13534740012.

The previous prime is 20302110019. The next prime is 20302110043. The reversal of 20302110021 is 12001120302.

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 20302110021 - 2¹ = 20302110019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302109979 and 20302110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302110121) 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, 3383685001 + ... + 3383685006.

It is an arithmetic number, because the mean of its divisors is an integer number (6767370008).

Almost surely, 2^20302110021 is an apocalyptic number.

It is an amenable number.

20302110021 is a deficient number, since it is larger than the sum of its proper divisors (6767370011).

20302110021 is an equidigital number, since it uses as much as digits as its factorization.

20302110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6767370010.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20302110021 its reverse (12001120302), we get a palindrome (32303230323).

The spelling of 20302110021 in words is "twenty billion, three hundred two million, one hundred ten thousand, twenty-one".