18916506960887 has 2 divisors, whose sum is σ = 18916506960888. Its totient is φ = 18916506960886.

The previous prime is 18916506960859. The next prime is 18916506960971. The reversal of 18916506960887 is 78806960561981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18916506960887 - 2³⁴ = 18899327091703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18916506960787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9458253480443 + 9458253480444.

It is an arithmetic number, because the mean of its divisors is an integer number (9458253480444).

Almost surely, 2^{18916506960887} is an apocalyptic number.

18916506960887 is a deficient number, since it is larger than the sum of its proper divisors (1).

18916506960887 is an equidigital number, since it uses as much as digits as its factorization.

18916506960887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 74.

The spelling of 18916506960887 in words is "eighteen trillion, nine hundred sixteen billion, five hundred six million, nine hundred sixty thousand, eight hundred eighty-seven".