12816812423 has 2 divisors, whose sum is σ = 12816812424. Its totient is φ = 12816812422.

The previous prime is 12816812389. The next prime is 12816812461. The reversal of 12816812423 is 32421861821.

It is an a-pointer prime, because the next prime (12816812461) can be obtained adding 12816812423 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12816812423 - 2⁸ = 12816812167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12816812623) 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 as a sum of consecutive naturals, namely, 6408406211 + 6408406212.

It is an arithmetic number, because the mean of its divisors is an integer number (6408406212).

Almost surely, 2^12816812423 is an apocalyptic number.

12816812423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12816812423 is an equidigital number, since it uses as much as digits as its factorization.

12816812423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The spelling of 12816812423 in words is "twelve billion, eight hundred sixteen million, eight hundred twelve thousand, four hundred twenty-three".