18798113 has 2 divisors, whose sum is σ = 18798114. Its totient is φ = 18798112.

The previous prime is 18798103. The next prime is 18798133. The reversal of 18798113 is 31189781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16386304 + 2411809 = 4048^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 18798113 - 2¹⁶ = 18732577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18798103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399056 + 9399057.

It is an arithmetic number, because the mean of its divisors is an integer number (9399057).

Almost surely, 2^18798113 is an apocalyptic number.

It is an amenable number.

18798113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18798113 is an equidigital number, since it uses as much as digits as its factorization.

18798113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 38.

The square root of 18798113 is about 4335.6790702265. The cubic root of 18798113 is about 265.8916823948.

The spelling of 18798113 in words is "eighteen million, seven hundred ninety-eight thousand, one hundred thirteen".