12388643923 has 8 divisors (see below), whose sum is σ = 12599280848. Its totient is φ = 12179113344.

The previous prime is 12388643899. The next prime is 12388643977. The reversal of 12388643923 is 32934688321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12388643923 - 2³³ = 3798709331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12388643123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253986 + ... + 298807.

It is an arithmetic number, because the mean of its divisors is an integer number (1574910106).

Almost surely, 2^12388643923 is an apocalyptic number.

12388643923 is a deficient number, since it is larger than the sum of its proper divisors (210636925).

12388643923 is an equidigital number, since it uses as much as digits as its factorization.

12388643923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553173.

The product of its digits is 1492992, while the sum is 49.

The spelling of 12388643923 in words is "twelve billion, three hundred eighty-eight million, six hundred forty-three thousand, nine hundred twenty-three".