18635000987 has 2 divisors, whose sum is σ = 18635000988. Its totient is φ = 18635000986.

The previous prime is 18635000983. The next prime is 18635000999. The reversal of 18635000987 is 78900053681.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18635000987 - 2² = 18635000983 is a prime.

It is not a weakly prime, because it can be changed into another prime (18635000983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9317500493 + 9317500494.

It is an arithmetic number, because the mean of its divisors is an integer number (9317500494).

Almost surely, 2^18635000987 is an apocalyptic number.

18635000987 is a deficient number, since it is larger than the sum of its proper divisors (1).

18635000987 is an equidigital number, since it uses as much as digits as its factorization.

18635000987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 18635000987 in words is "eighteen billion, six hundred thirty-five million, nine hundred eighty-seven", and thus it is an aban number.