12688919423 has 4 divisors (see below), whose sum is σ = 12958896480. Its totient is φ = 12418942368.

The previous prime is 12688919413. The next prime is 12688919461. The reversal of 12688919423 is 32491988621.

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 12688919423 - 2⁸ = 12688919167 is a prime.

It is a super-2 number, since 2×12688919423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688919413) 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, 134988458 + ... + 134988551.

It is an arithmetic number, because the mean of its divisors is an integer number (3239724120).

Almost surely, 2^12688919423 is an apocalyptic number.

12688919423 is a deficient number, since it is larger than the sum of its proper divisors (269977057).

12688919423 is an equidigital number, since it uses as much as digits as its factorization.

12688919423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269977056.

The product of its digits is 1492992, while the sum is 53.

The spelling of 12688919423 in words is "twelve billion, six hundred eighty-eight million, nine hundred nineteen thousand, four hundred twenty-three".