12017868605187 has 128 divisors (see below), whose sum is σ = 17442083635200. Its totient is φ = 7337913762816.

The previous prime is 12017868605173. The next prime is 12017868605189. The reversal of 12017868605187 is 78150686871021.

It is not a de Polignac number, because 12017868605187 - 2⁷ = 12017868605059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12017868605187.

It is not an unprimeable number, because it can be changed into a prime (12017868605189) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16174789138 + ... + 16174789880.

It is an arithmetic number, because the mean of its divisors is an integer number (136266278400).

Almost surely, 2^{12017868605187} is an apocalyptic number.

12017868605187 is a deficient number, since it is larger than the sum of its proper divisors (5424215030013).

12017868605187 is a wasteful number, since it uses less digits than its factorization.

12017868605187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305.

The product of its (nonzero) digits is 9031680, while the sum is 60.

The spelling of 12017868605187 in words is "twelve trillion, seventeen billion, eight hundred sixty-eight million, six hundred five thousand, one hundred eighty-seven".