18118716172 has 24 divisors (see below), whose sum is σ = 32070173184. Its totient is φ = 8956159632.

The previous prime is 18118716169. The next prime is 18118716257. The reversal of 18118716172 is 27161781181.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 164973 + ... + 251899.

It is an arithmetic number, because the mean of its divisors is an integer number (1336257216).

Almost surely, 2^18118716172 is an apocalyptic number.

It is an amenable number.

18118716172 is a deficient number, since it is larger than the sum of its proper divisors (13951457012).

18118716172 is a wasteful number, since it uses less digits than its factorization.

18118716172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87525 (or 87523 counting only the distinct ones).

The product of its digits is 37632, while the sum is 43.

The spelling of 18118716172 in words is "eighteen billion, one hundred eighteen million, seven hundred sixteen thousand, one hundred seventy-two".