18676369 has 2 divisors, whose sum is σ = 18676370. Its totient is φ = 18676368.

The previous prime is 18676351. The next prime is 18676381. The reversal of 18676369 is 96367681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15904144 + 2772225 = 3988^2 + 1665^2 .

It is an emirp because it is prime and its reverse (96367681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18676369 - 2⁷ = 18676241 is a prime.

It is a super-3 number, since 3×18676369³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (18676769) 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, 9338184 + 9338185.

It is an arithmetic number, because the mean of its divisors is an integer number (9338185).

Almost surely, 2^18676369 is an apocalyptic number.

It is an amenable number.

18676369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18676369 is an equidigital number, since it uses as much as digits as its factorization.

18676369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 18676369 is about 4321.6164799760. The cubic root of 18676369 is about 265.3164322557.

The spelling of 18676369 in words is "eighteen million, six hundred seventy-six thousand, three hundred sixty-nine".