23303065521 has 16 divisors (see below), whose sum is σ = 32390604288. Its totient is φ = 14885376000.

The previous prime is 23303065517. The next prime is 23303065529. The reversal of 23303065521 is 12556030332.

It is not a de Polignac number, because 23303065521 - 2² = 23303065517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23303065529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1231056 + ... + 1249841.

It is an arithmetic number, because the mean of its divisors is an integer number (2024412768).

Almost surely, 2^23303065521 is an apocalyptic number.

It is an amenable number.

23303065521 is a deficient number, since it is larger than the sum of its proper divisors (9087538767).

23303065521 is a wasteful number, since it uses less digits than its factorization.

23303065521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481032.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 23303065521 its reverse (12556030332), we get a palindrome (35859095853).

The spelling of 23303065521 in words is "twenty-three billion, three hundred three million, sixty-five thousand, five hundred twenty-one".