18587645107 has 2 divisors, whose sum is σ = 18587645108. Its totient is φ = 18587645106.

The previous prime is 18587645059. The next prime is 18587645123. The reversal of 18587645107 is 70154678581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18587645107 - 2¹⁵ = 18587612339 is a prime.

It is not a weakly prime, because it can be changed into another prime (18587645407) 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, 9293822553 + 9293822554.

It is an arithmetic number, because the mean of its divisors is an integer number (9293822554).

Almost surely, 2^18587645107 is an apocalyptic number.

18587645107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18587645107 is an equidigital number, since it uses as much as digits as its factorization.

18587645107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 18587645107 in words is "eighteen billion, five hundred eighty-seven million, six hundred forty-five thousand, one hundred seven".