18674419 has 4 divisors (see below), whose sum is σ = 18899496. Its totient is φ = 18449344.

The previous prime is 18674407. The next prime is 18674423. The reversal of 18674419 is 91447681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91447681 = 13 ⋅7034437.

It is a cyclic number.

It is not a de Polignac number, because 18674419 - 2⁵ = 18674387 is a prime.

It is a super-2 number, since 2×18674419² = 697467849975122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18674429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112414 + ... + 112579.

It is an arithmetic number, because the mean of its divisors is an integer number (4724874).

Almost surely, 2^18674419 is an apocalyptic number.

18674419 is a deficient number, since it is larger than the sum of its proper divisors (225077).

18674419 is an equidigital number, since it uses as much as digits as its factorization.

18674419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225076.

The product of its digits is 48384, while the sum is 40.

The square root of 18674419 is about 4321.3908640622. The cubic root of 18674419 is about 265.3071980366.

The spelling of 18674419 in words is "eighteen million, six hundred seventy-four thousand, four hundred nineteen".