18840118111 has 2 divisors, whose sum is σ = 18840118112. Its totient is φ = 18840118110.

The previous prime is 18840118109. The next prime is 18840118127. The reversal of 18840118111 is 11181104881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18840118111 - 2¹ = 18840118109 is a prime.

Together with 18840118109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18840118181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9420059055 + 9420059056.

It is an arithmetic number, because the mean of its divisors is an integer number (9420059056).

Almost surely, 2^18840118111 is an apocalyptic number.

18840118111 is a deficient number, since it is larger than the sum of its proper divisors (1).

18840118111 is an equidigital number, since it uses as much as digits as its factorization.

18840118111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 34.

The spelling of 18840118111 in words is "eighteen billion, eight hundred forty million, one hundred eighteen thousand, one hundred eleven".