18116487227 has 4 divisors (see below), whose sum is σ = 18117477936. Its totient is φ = 18115496520.

The previous prime is 18116487209. The next prime is 18116487229. The reversal of 18116487227 is 72278461181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18116487227 - 2⁶ = 18116487163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18116487229) 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 in 3 ways as a sum of consecutive naturals, for example, 467399 + ... + 504672.

It is an arithmetic number, because the mean of its divisors is an integer number (4529369484).

Almost surely, 2^18116487227 is an apocalyptic number.

18116487227 is a deficient number, since it is larger than the sum of its proper divisors (990709).

18116487227 is an equidigital number, since it uses as much as digits as its factorization.

18116487227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990708.

The product of its digits is 301056, while the sum is 47.

The spelling of 18116487227 in words is "eighteen billion, one hundred sixteen million, four hundred eighty-seven thousand, two hundred twenty-seven".