20233030021 has 2 divisors, whose sum is σ = 20233030022. Its totient is φ = 20233030020.

The previous prime is 20233030007. The next prime is 20233030033. The reversal of 20233030021 is 12003033202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20224821796 + 8208225 = 142214^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233030021 - 2⁵ = 20233029989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20233029977 and 20233030004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20233030001) 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, 10116515010 + 10116515011.

It is an arithmetic number, because the mean of its divisors is an integer number (10116515011).

Almost surely, 2^20233030021 is an apocalyptic number.

It is an amenable number.

20233030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233030021 is an equidigital number, since it uses as much as digits as its factorization.

20233030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20233030021 its reverse (12003033202), we get a palindrome (32236063223).

The spelling of 20233030021 in words is "twenty billion, two hundred thirty-three million, thirty thousand, twenty-one".