18825311 has 2 divisors, whose sum is σ = 18825312. Its totient is φ = 18825310.

The previous prime is 18825269. The next prime is 18825329. The reversal of 18825311 is 11352881.

It is a strong prime.

It is an emirp because it is prime and its reverse (11352881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18825311 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18825361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9412655 + 9412656.

It is an arithmetic number, because the mean of its divisors is an integer number (9412656).

Almost surely, 2^18825311 is an apocalyptic number.

18825311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18825311 is an equidigital number, since it uses as much as digits as its factorization.

18825311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 29.

The square root of 18825311 is about 4338.8144694144. The cubic root of 18825311 is about 266.0198554911.

The spelling of 18825311 in words is "eighteen million, eight hundred twenty-five thousand, three hundred eleven".