18112279 has 2 divisors, whose sum is σ = 18112280. Its totient is φ = 18112278.

The previous prime is 18112253. The next prime is 18112307. The reversal of 18112279 is 97221181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18112279 - 2¹³ = 18104087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18112279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18112219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056139 + 9056140.

It is an arithmetic number, because the mean of its divisors is an integer number (9056140).

Almost surely, 2^18112279 is an apocalyptic number.

18112279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18112279 is an equidigital number, since it uses as much as digits as its factorization.

18112279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 18112279 is about 4255.8523235658. The cubic root of 18112279 is about 262.6179255488.

The spelling of 18112279 in words is "eighteen million, one hundred twelve thousand, two hundred seventy-nine".