23723719647 has 4 divisors (see below), whose sum is σ = 31631626200. Its totient is φ = 15815813096.

The previous prime is 23723719619. The next prime is 23723719661. The reversal of 23723719647 is 74691732732.

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 23723719647 - 2¹⁵ = 23723686879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23723719647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23723719667) 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, 3953953272 + ... + 3953953277.

It is an arithmetic number, because the mean of its divisors is an integer number (7907906550).

Almost surely, 2^23723719647 is an apocalyptic number.

23723719647 is a deficient number, since it is larger than the sum of its proper divisors (7907906553).

23723719647 is an equidigital number, since it uses as much as digits as its factorization.

23723719647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7907906552.

The product of its digits is 2667168, while the sum is 51.

The spelling of 23723719647 in words is "twenty-three billion, seven hundred twenty-three million, seven hundred nineteen thousand, six hundred forty-seven".