23694728987 has 4 divisors (see below), whose sum is σ = 24245769240. Its totient is φ = 23143688736.

The previous prime is 23694728983. The next prime is 23694728989. The reversal of 23694728987 is 78982749632.

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 23694728987 - 2² = 23694728983 is a prime.

It is a super-2 number, since 2×23694728987² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23694728983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275520062 + ... + 275520147.

It is an arithmetic number, because the mean of its divisors is an integer number (6061442310).

Almost surely, 2^23694728987 is an apocalyptic number.

23694728987 is a deficient number, since it is larger than the sum of its proper divisors (551040253).

23694728987 is an equidigital number, since it uses as much as digits as its factorization.

23694728987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551040252.

The product of its digits is 73156608, while the sum is 65.

The spelling of 23694728987 in words is "twenty-three billion, six hundred ninety-four million, seven hundred twenty-eight thousand, nine hundred eighty-seven".