23963678543 has 4 divisors (see below), whose sum is σ = 27387061200. Its totient is φ = 20540295888.

The previous prime is 23963678491. The next prime is 23963678569. The reversal of 23963678543 is 34587636932.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-23963678543 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 (23963678143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711691318 + ... + 1711691331.

It is an arithmetic number, because the mean of its divisors is an integer number (6846765300).

Almost surely, 2^23963678543 is an apocalyptic number.

23963678543 is a deficient number, since it is larger than the sum of its proper divisors (3423382657).

23963678543 is an equidigital number, since it uses as much as digits as its factorization.

23963678543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423382656.

The product of its digits is 19595520, while the sum is 56.

The spelling of 23963678543 in words is "twenty-three billion, nine hundred sixty-three million, six hundred seventy-eight thousand, five hundred forty-three".