18587645059 has 2 divisors, whose sum is σ = 18587645060. Its totient is φ = 18587645058.

The previous prime is 18587645051. The next prime is 18587645107. The reversal of 18587645059 is 95054678581.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18587645059 - 2³ = 18587645051 is a prime.

It is a super-2 number, since 2×18587645059² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18587644994 and 18587645012.

It is not a weakly prime, because it can be changed into another prime (18587645051) 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, 9293822529 + 9293822530.

It is an arithmetic number, because the mean of its divisors is an integer number (9293822530).

Almost surely, 2^18587645059 is an apocalyptic number.

18587645059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18587645059 is an equidigital number, since it uses as much as digits as its factorization.

18587645059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 58.

The spelling of 18587645059 in words is "eighteen billion, five hundred eighty-seven million, six hundred forty-five thousand, fifty-nine".