18050111 has 2 divisors, whose sum is σ = 18050112. Its totient is φ = 18050110.

The previous prime is 18050099. The next prime is 18050113. The reversal of 18050111 is 11105081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18050111 is a prime.

It is a super-2 number, since 2×18050111² = 651613014224642, which contains 22 as substring.

Together with 18050113, it forms a pair of twin primes.

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 18050111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18050113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025055 + 9025056.

It is an arithmetic number, because the mean of its divisors is an integer number (9025056).

Almost surely, 2^18050111 is an apocalyptic number.

18050111 is a deficient number, since it is larger than the sum of its proper divisors (1).

18050111 is an equidigital number, since it uses as much as digits as its factorization.

18050111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

The square root of 18050111 is about 4248.5422205740. The cubic root of 18050111 is about 262.3171140324.

Adding to 18050111 its reverse (11105081), we get a palindrome (29155192).

The spelling of 18050111 in words is "eighteen million, fifty thousand, one hundred eleven".