18927211141187 has 2 divisors, whose sum is σ = 18927211141188. Its totient is φ = 18927211141186.

The previous prime is 18927211141103. The next prime is 18927211141217. The reversal of 18927211141187 is 78114111272981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18927211141187 - 2¹² = 18927211137091 is a prime.

It is not a weakly prime, because it can be changed into another prime (18927211141687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9463605570593 + 9463605570594.

It is an arithmetic number, because the mean of its divisors is an integer number (9463605570594).

Almost surely, 2^{18927211141187} is an apocalyptic number.

18927211141187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18927211141187 is an equidigital number, since it uses as much as digits as its factorization.

18927211141187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 53.

The spelling of 18927211141187 in words is "eighteen trillion, nine hundred twenty-seven billion, two hundred eleven million, one hundred forty-one thousand, one hundred eighty-seven".