18778068103 has 2 divisors, whose sum is σ = 18778068104. Its totient is φ = 18778068102.

The previous prime is 18778068083. The next prime is 18778068149. The reversal of 18778068103 is 30186087781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18778068103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18778068193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9389034051 + 9389034052.

It is an arithmetic number, because the mean of its divisors is an integer number (9389034052).

Almost surely, 2^18778068103 is an apocalyptic number.

18778068103 is a deficient number, since it is larger than the sum of its proper divisors (1).

18778068103 is an equidigital number, since it uses as much as digits as its factorization.

18778068103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 18778068103 in words is "eighteen billion, seven hundred seventy-eight million, sixty-eight thousand, one hundred three".