23345126521 has 4 divisors (see below), whose sum is σ = 23371625844. Its totient is φ = 23318627200.

The previous prime is 23345126503. The next prime is 23345126531. The reversal of 23345126521 is 12562154332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9517953600 + 13827172921 = 97560^2 + 117589^2 .

It is a cyclic number.

It is not a de Polignac number, because 23345126521 - 2³³ = 14755191929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23345126501) 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, 13248340 + ... + 13250101.

It is an arithmetic number, because the mean of its divisors is an integer number (5842906461).

Almost surely, 2^23345126521 is an apocalyptic number.

It is an amenable number.

23345126521 is a deficient number, since it is larger than the sum of its proper divisors (26499323).

23345126521 is an equidigital number, since it uses as much as digits as its factorization.

23345126521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26499322.

The product of its digits is 43200, while the sum is 34.

The spelling of 23345126521 in words is "twenty-three billion, three hundred forty-five million, one hundred twenty-six thousand, five hundred twenty-one".