18484867987 has 2 divisors, whose sum is σ = 18484867988. Its totient is φ = 18484867986.

The previous prime is 18484867981. The next prime is 18484868021. The reversal of 18484867987 is 78976848481.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18484867987 is a prime.

It is not a weakly prime, because it can be changed into another prime (18484867981) 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, 9242433993 + 9242433994.

It is an arithmetic number, because the mean of its divisors is an integer number (9242433994).

Almost surely, 2^18484867987 is an apocalyptic number.

18484867987 is a deficient number, since it is larger than the sum of its proper divisors (1).

18484867987 is an equidigital number, since it uses as much as digits as its factorization.

18484867987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 173408256, while the sum is 70.

The spelling of 18484867987 in words is "eighteen billion, four hundred eighty-four million, eight hundred sixty-seven thousand, nine hundred eighty-seven".