21310023233023 has 12 divisors (see below), whose sum is σ = 24792154218000. Its totient is φ = 18263565291552.

The previous prime is 21310023232999. The next prime is 21310023233029. The reversal of 21310023233023 is 32033232001312.

It is a de Polignac number, because none of the positive numbers 2^k-21310023233023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310023233029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25403398 + ... + 26228851.

It is an arithmetic number, because the mean of its divisors is an integer number (2066012851500).

Almost surely, 2^{21310023233023} is an apocalyptic number.

21310023233023 is a deficient number, since it is larger than the sum of its proper divisors (3482130984977).

21310023233023 is an equidigital number, since it uses as much as digits as its factorization.

21310023233023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51640686 (or 51640679 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21310023233023 its reverse (32033232001312), we get a palindrome (53343255234335).

The spelling of 21310023233023 in words is "twenty-one trillion, three hundred ten billion, twenty-three million, two hundred thirty-three thousand, twenty-three".