23515330447 has 12 divisors (see below), whose sum is σ = 27416904240. Its totient is φ = 20110065696.

The previous prime is 23515330441. The next prime is 23515330463. The reversal of 23515330447 is 74403351532.

It is a de Polignac number, because none of the positive numbers 2^k-23515330447 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 (23515330441) 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, 525078 + ... + 568099.

It is an arithmetic number, because the mean of its divisors is an integer number (2284742020).

Almost surely, 2^23515330447 is an apocalyptic number.

23515330447 is a deficient number, since it is larger than the sum of its proper divisors (3901573793).

23515330447 is a wasteful number, since it uses less digits than its factorization.

23515330447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093630 (or 1093623 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 37.

Adding to 23515330447 its reverse (74403351532), we get a palindrome (97918681979).

The spelling of 23515330447 in words is "twenty-three billion, five hundred fifteen million, three hundred thirty thousand, four hundred forty-seven".