18825173 has 2 divisors, whose sum is σ = 18825174. Its totient is φ = 18825172.

The previous prime is 18825161. The next prime is 18825211. The reversal of 18825173 is 37152881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13410244 + 5414929 = 3662^2 + 2327^2 .

It is an emirp because it is prime and its reverse (37152881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18825173 - 2⁸ = 18824917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18825133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9412586 + 9412587.

It is an arithmetic number, because the mean of its divisors is an integer number (9412587).

Almost surely, 2^18825173 is an apocalyptic number.

It is an amenable number.

18825173 is a deficient number, since it is larger than the sum of its proper divisors (1).

18825173 is an equidigital number, since it uses as much as digits as its factorization.

18825173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 18825173 is about 4338.7985664237. The cubic root of 18825173 is about 266.0192054650.

The spelling of 18825173 in words is "eighteen million, eight hundred twenty-five thousand, one hundred seventy-three".