18826111 has 2 divisors, whose sum is σ = 18826112. Its totient is φ = 18826110.

The previous prime is 18826103. The next prime is 18826117. The reversal of 18826111 is 11162881.

It is a strong prime.

It is an emirp because it is prime and its reverse (11162881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18826111 - 2³ = 18826103 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18826111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18826117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9413055 + 9413056.

It is an arithmetic number, because the mean of its divisors is an integer number (9413056).

Almost surely, 2^18826111 is an apocalyptic number.

18826111 is a deficient number, since it is larger than the sum of its proper divisors (1).

18826111 is an equidigital number, since it uses as much as digits as its factorization.

18826111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 28.

The square root of 18826111 is about 4338.9066595169. The cubic root of 18826111 is about 266.0236236957.

Adding to 18826111 its reverse (11162881), we get a palindrome (29988992).

The spelling of 18826111 in words is "eighteen million, eight hundred twenty-six thousand, one hundred eleven".