21310013023 has 8 divisors (see below), whose sum is σ = 22950572400. Its totient is φ = 19669643328.

The previous prime is 21310013017. The next prime is 21310013041. The reversal of 21310013023 is 32031001312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21310013023 - 2⁵ = 21310012991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310012988 and 21310013006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310043023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259563 + ... + 331651.

It is an arithmetic number, because the mean of its divisors is an integer number (2868821550).

Almost surely, 2^21310013023 is an apocalyptic number.

21310013023 is a deficient number, since it is larger than the sum of its proper divisors (1640559377).

21310013023 is a wasteful number, since it uses less digits than its factorization.

21310013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94841.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21310013023 its reverse (32031001312), we get a palindrome (53341014335).

The spelling of 21310013023 in words is "twenty-one billion, three hundred ten million, thirteen thousand, twenty-three".