18224111 has 2 divisors, whose sum is σ = 18224112. Its totient is φ = 18224110.

The previous prime is 18224081. The next prime is 18224113. The reversal of 18224111 is 11142281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18224111 - 2⁶ = 18224047 is a prime.

Together with 18224113, 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 (18224113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9112055 + 9112056.

It is an arithmetic number, because the mean of its divisors is an integer number (9112056).

Almost surely, 2^18224111 is an apocalyptic number.

18224111 is a deficient number, since it is larger than the sum of its proper divisors (1).

18224111 is an equidigital number, since it uses as much as digits as its factorization.

18224111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 20.

The square root of 18224111 is about 4268.9707190376. The cubic root of 18224111 is about 263.1573174366.

Adding to 18224111 its reverse (11142281), we get a palindrome (29366392).

The spelling of 18224111 in words is "eighteen million, two hundred twenty-four thousand, one hundred eleven".