23517212887 has 4 divisors (see below), whose sum is σ = 26876814736. Its totient is φ = 20157611040.

The previous prime is 23517212867. The next prime is 23517212903. The reversal of 23517212887 is 78821271532.

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

It is not a de Polignac number, because 23517212887 - 2¹¹ = 23517210839 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 (23517212867) 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, 1679800914 + ... + 1679800927.

It is an arithmetic number, because the mean of its divisors is an integer number (6719203684).

Almost surely, 2^23517212887 is an apocalyptic number.

23517212887 is a deficient number, since it is larger than the sum of its proper divisors (3359601849).

23517212887 is an equidigital number, since it uses as much as digits as its factorization.

23517212887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359601848.

The product of its digits is 376320, while the sum is 46.

The spelling of 23517212887 in words is "twenty-three billion, five hundred seventeen million, two hundred twelve thousand, eight hundred eighty-seven".