18752113 has 2 divisors, whose sum is σ = 18752114. Its totient is φ = 18752112.

The previous prime is 18752099. The next prime is 18752131. The reversal of 18752113 is 31125781.

Together with next prime (18752131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 4524129 = 3772^2 + 2127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18752113 is a prime.

It is not a weakly prime, because it can be changed into another prime (18752413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9376056 + 9376057.

It is an arithmetic number, because the mean of its divisors is an integer number (9376057).

Almost surely, 2^18752113 is an apocalyptic number.

It is an amenable number.

18752113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18752113 is an equidigital number, since it uses as much as digits as its factorization.

18752113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 18752113 is about 4330.3710002724. The cubic root of 18752113 is about 265.6746214655.

Adding to 18752113 its reverse (31125781), we get a palindrome (49877894).

The spelling of 18752113 in words is "eighteen million, seven hundred fifty-two thousand, one hundred thirteen".