18166541518 has 16 divisors (see below), whose sum is σ = 27472435200. Its totient is φ = 9009105336.

The previous prime is 18166541507. The next prime is 18166541521. The reversal of 18166541518 is 81514566181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079533 + ... + 1096231.

It is an arithmetic number, because the mean of its divisors is an integer number (1717027200).

Almost surely, 2^18166541518 is an apocalyptic number.

18166541518 is a deficient number, since it is larger than the sum of its proper divisors (9305893682).

18166541518 is a wasteful number, since it uses less digits than its factorization.

18166541518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111.

The product of its digits is 230400, while the sum is 46.

The spelling of 18166541518 in words is "eighteen billion, one hundred sixty-six million, five hundred forty-one thousand, five hundred eighteen".