19838113 has 2 divisors, whose sum is σ = 19838114. Its totient is φ = 19838112.

The previous prime is 19838081. The next prime is 19838123. The reversal of 19838113 is 31183891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19651489 + 186624 = 4433^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 19838113 - 2⁵ = 19838081 is a prime.

It is not a weakly prime, because it can be changed into another prime (19838123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9919056 + 9919057.

It is an arithmetic number, because the mean of its divisors is an integer number (9919057).

Almost surely, 2^19838113 is an apocalyptic number.

It is an amenable number.

19838113 is a deficient number, since it is larger than the sum of its proper divisors (1).

19838113 is an equidigital number, since it uses as much as digits as its factorization.

19838113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 19838113 is about 4453.9996632241. Note that the first 3 decimals coincide. The cubic root of 19838113 is about 270.7073951332.

The spelling of 19838113 in words is "nineteen million, eight hundred thirty-eight thousand, one hundred thirteen".