21031032023 has 2 divisors, whose sum is σ = 21031032024. Its totient is φ = 21031032022.

The previous prime is 21031031947. The next prime is 21031032047. The reversal of 21031032023 is 32023013012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21031032023 - 2³² = 16736064727 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21031031992 and 21031032010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21031032053) 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, 10515516011 + 10515516012.

It is an arithmetic number, because the mean of its divisors is an integer number (10515516012).

Almost surely, 2^21031032023 is an apocalyptic number.

21031032023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031032023 is an equidigital number, since it uses as much as digits as its factorization.

21031032023 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 17.

Adding to 21031032023 its reverse (32023013012), we get a palindrome (53054045035).

The spelling of 21031032023 in words is "twenty-one billion, thirty-one million, thirty-two thousand, twenty-three".