20020232021 has 2 divisors, whose sum is σ = 20020232022. Its totient is φ = 20020232020.

The previous prime is 20020231963. The next prime is 20020232081. The reversal of 20020232021 is 12023202002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10458130225 + 9562101796 = 102265^2 + 97786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020232021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020231987 and 20020232005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020232081) 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 as a sum of consecutive naturals, namely, 10010116010 + 10010116011.

It is an arithmetic number, because the mean of its divisors is an integer number (10010116011).

Almost surely, 2^20020232021 is an apocalyptic number.

It is an amenable number.

20020232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020232021 is an equidigital number, since it uses as much as digits as its factorization.

20020232021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20020232021 its reverse (12023202002), we get a palindrome (32043434023).

The spelling of 20020232021 in words is "twenty billion, twenty million, two hundred thirty-two thousand, twenty-one".