12938794366823 has 4 divisors (see below), whose sum is σ = 13934086241208. Its totient is φ = 11943502492440.

The previous prime is 12938794366807. The next prime is 12938794366867. The reversal of 12938794366823 is 32866349783921.

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 12938794366823 - 2⁴ = 12938794366807 is a prime.

It is a super-2 number, since 2×12938794366823² (a number of 27 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 (12938794386823) 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, 497645937173 + ... + 497645937198.

It is an arithmetic number, because the mean of its divisors is an integer number (3483521560302).

Almost surely, 2^{12938794366823} is an apocalyptic number.

12938794366823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12938794366823 is a deficient number, since it is larger than the sum of its proper divisors (995291874385).

12938794366823 is an equidigital number, since it uses as much as digits as its factorization.

12938794366823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995291874384.

The product of its digits is 564350976, while the sum is 71.

The spelling of 12938794366823 in words is "twelve trillion, nine hundred thirty-eight billion, seven hundred ninety-four million, three hundred sixty-six thousand, eight hundred twenty-three".