20302102021 has 2 divisors, whose sum is σ = 20302102022. Its totient is φ = 20302102020.

The previous prime is 20302102013. The next prime is 20302102031. The reversal of 20302102021 is 12020120302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20209749921 + 92352100 = 142161^2 + 9610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302102021 - 2³ = 20302102013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20302101992 and 20302102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302102031) 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 as a sum of consecutive naturals, namely, 10151051010 + 10151051011.

It is an arithmetic number, because the mean of its divisors is an integer number (10151051011).

Almost surely, 2^20302102021 is an apocalyptic number.

It is an amenable number.

20302102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302102021 is an equidigital number, since it uses as much as digits as its factorization.

20302102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20302102021 its reverse (12020120302), we get a palindrome (32322222323).

The spelling of 20302102021 in words is "twenty billion, three hundred two million, one hundred two thousand, twenty-one".