18858113 has 2 divisors, whose sum is σ = 18858114. Its totient is φ = 18858112.

The previous prime is 18858053. The next prime is 18858143. The reversal of 18858113 is 31185881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13965169 + 4892944 = 3737^2 + 2212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18858113 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18858143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9429056 + 9429057.

It is an arithmetic number, because the mean of its divisors is an integer number (9429057).

Almost surely, 2^18858113 is an apocalyptic number.

It is an amenable number.

18858113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18858113 is an equidigital number, since it uses as much as digits as its factorization.

18858113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 35.

The square root of 18858113 is about 4342.5928890468. The cubic root of 18858113 is about 266.1742738347.

The spelling of 18858113 in words is "eighteen million, eight hundred fifty-eight thousand, one hundred thirteen".