18682849 has 2 divisors, whose sum is σ = 18682850. Its totient is φ = 18682848.

The previous prime is 18682799. The next prime is 18682901. The reversal of 18682849 is 94828681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 20449 = 4320^2 + 143^2 .

It is an emirp because it is prime and its reverse (94828681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18682849 - 2⁷ = 18682721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18682799 and 18682808.

It is not a weakly prime, because it can be changed into another prime (18686849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341424 + 9341425.

It is an arithmetic number, because the mean of its divisors is an integer number (9341425).

Almost surely, 2^18682849 is an apocalyptic number.

It is an amenable number.

18682849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18682849 is an equidigital number, since it uses as much as digits as its factorization.

18682849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

The square root of 18682849 is about 4322.3661344222. The cubic root of 18682849 is about 265.3471136599.

The spelling of 18682849 in words is "eighteen million, six hundred eighty-two thousand, eight hundred forty-nine".