18718718714413 has 2 divisors, whose sum is σ = 18718718714414. Its totient is φ = 18718718714412.

The previous prime is 18718718714401. The next prime is 18718718714461. The reversal of 18718718714413 is 31441781781781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15607580113449 + 3111138600964 = 3950643^2 + 1763842^2 .

It is a cyclic number.

It is not a de Polignac number, because 18718718714413 - 2¹³ = 18718718706221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18718718714483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9359359357206 + 9359359357207.

It is an arithmetic number, because the mean of its divisors is an integer number (9359359357207).

Almost surely, 2^{18718718714413} is an apocalyptic number.

It is an amenable number.

18718718714413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18718718714413 is an equidigital number, since it uses as much as digits as its factorization.

18718718714413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8429568, while the sum is 61.

The spelling of 18718718714413 in words is "eighteen trillion, seven hundred eighteen billion, seven hundred eighteen million, seven hundred fourteen thousand, four hundred thirteen".