18182318689 has 4 divisors (see below), whose sum is σ = 18210596656. Its totient is φ = 18154040724.

The previous prime is 18182318683. The next prime is 18182318699. The reversal of 18182318689 is 98681328181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18182318689 - 2⁹ = 18182318177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18182318683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14138019 + ... + 14139304.

It is an arithmetic number, because the mean of its divisors is an integer number (4552649164).

Almost surely, 2^18182318689 is an apocalyptic number.

It is an amenable number.

18182318689 is a deficient number, since it is larger than the sum of its proper divisors (28277967).

18182318689 is an equidigital number, since it uses as much as digits as its factorization.

18182318689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28277966.

The product of its digits is 1327104, while the sum is 55.

The spelling of 18182318689 in words is "eighteen billion, one hundred eighty-two million, three hundred eighteen thousand, six hundred eighty-nine".