18674219 has 2 divisors, whose sum is σ = 18674220. Its totient is φ = 18674218.

The previous prime is 18674213. The next prime is 18674239. The reversal of 18674219 is 91247681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18674219 - 2¹² = 18670123 is a prime.

It is a super-2 number, since 2×18674219² = 697452910519922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18674213) 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, 9337109 + 9337110.

It is an arithmetic number, because the mean of its divisors is an integer number (9337110).

Almost surely, 2^18674219 is an apocalyptic number.

18674219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18674219 is an equidigital number, since it uses as much as digits as its factorization.

18674219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 18674219 is about 4321.3677233024. The cubic root of 18674219 is about 265.3062509008.

The spelling of 18674219 in words is "eighteen million, six hundred seventy-four thousand, two hundred nineteen".