18111479 has 2 divisors, whose sum is σ = 18111480. Its totient is φ = 18111478.

The previous prime is 18111473. The next prime is 18111481. The reversal of 18111479 is 97411181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18111479 is a prime.

Together with 18111481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18111473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9055739 + 9055740.

It is an arithmetic number, because the mean of its divisors is an integer number (9055740).

Almost surely, 2^18111479 is an apocalyptic number.

18111479 is a deficient number, since it is larger than the sum of its proper divisors (1).

18111479 is an equidigital number, since it uses as much as digits as its factorization.

18111479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 32.

The square root of 18111479 is about 4255.7583343042. The cubic root of 18111479 is about 262.6140589742.

The spelling of 18111479 in words is "eighteen million, one hundred eleven thousand, four hundred seventy-nine".