18350099987 has 2 divisors, whose sum is σ = 18350099988. Its totient is φ = 18350099986.

The previous prime is 18350099983. The next prime is 18350100017. The reversal of 18350099987 is 78999005381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18350099987 - 2² = 18350099983 is a prime.

It is not a weakly prime, because it can be changed into another prime (18350099981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175049993 + 9175049994.

It is an arithmetic number, because the mean of its divisors is an integer number (9175049994).

Almost surely, 2^18350099987 is an apocalyptic number.

18350099987 is a deficient number, since it is larger than the sum of its proper divisors (1).

18350099987 is an equidigital number, since it uses as much as digits as its factorization.

18350099987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 18350099987 in words is "eighteen billion, three hundred fifty million, ninety-nine thousand, nine hundred eighty-seven".