21310534416023 has 4 divisors (see below), whose sum is σ = 21406097350848. Its totient is φ = 21214971481200.

The previous prime is 21310534416019. The next prime is 21310534416079. The reversal of 21310534416023 is 32061443501312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21310534416023 - 2² = 21310534416019 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 (21310534416623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47781467078 + ... + 47781467523.

It is an arithmetic number, because the mean of its divisors is an integer number (5351524337712).

Almost surely, 2^{21310534416023} is an apocalyptic number.

21310534416023 is a deficient number, since it is larger than the sum of its proper divisors (95562934825).

21310534416023 is an equidigital number, since it uses as much as digits as its factorization.

21310534416023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95562934824.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 21310534416023 its reverse (32061443501312), we get a palindrome (53371977917335).

The spelling of 21310534416023 in words is "twenty-one trillion, three hundred ten billion, five hundred thirty-four million, four hundred sixteen thousand, twenty-three".