18736853 has 2 divisors, whose sum is σ = 18736854. Its totient is φ = 18736852.

The previous prime is 18736849. The next prime is 18736859. The reversal of 18736853 is 35863781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18722929 + 13924 = 4327^2 + 118^2 .

It is an emirp because it is prime and its reverse (35863781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18736853 - 2² = 18736849 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18736853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18736859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9368426 + 9368427.

It is an arithmetic number, because the mean of its divisors is an integer number (9368427).

Almost surely, 2^18736853 is an apocalyptic number.

It is an amenable number.

18736853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18736853 is an equidigital number, since it uses as much as digits as its factorization.

18736853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 18736853 is about 4328.6086679209. The cubic root of 18736853 is about 265.6025354566.

The spelling of 18736853 in words is "eighteen million, seven hundred thirty-six thousand, eight hundred fifty-three".