12918778703 has 4 divisors (see below), whose sum is σ = 13678706880. Its totient is φ = 12158850528.

The previous prime is 12918778679. The next prime is 12918778739. The reversal of 12918778703 is 30787781921.

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 12918778703 - 2¹⁰ = 12918777679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918778753) 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, 379964063 + ... + 379964096.

It is an arithmetic number, because the mean of its divisors is an integer number (3419676720).

Almost surely, 2^12918778703 is an apocalyptic number.

12918778703 is a deficient number, since it is larger than the sum of its proper divisors (759928177).

12918778703 is an equidigital number, since it uses as much as digits as its factorization.

12918778703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759928176.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The spelling of 12918778703 in words is "twelve billion, nine hundred eighteen million, seven hundred seventy-eight thousand, seven hundred three".