18494419 has 4 divisors (see below), whose sum is σ = 19582344. Its totient is φ = 17406496.

The previous prime is 18494401. The next prime is 18494501. The reversal of 18494419 is 91449481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91449481 = 1571 ⋅58211.

It is a cyclic number.

It is not a de Polignac number, because 18494419 - 2⁹ = 18493907 is a prime.

It is a super-2 number, since 2×18494419² = 684087068295122, 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 (18494519) 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 in 3 ways as a sum of consecutive naturals, for example, 543937 + ... + 543970.

It is an arithmetic number, because the mean of its divisors is an integer number (4895586).

Almost surely, 2^18494419 is an apocalyptic number.

18494419 is a deficient number, since it is larger than the sum of its proper divisors (1087925).

18494419 is a wasteful number, since it uses less digits than its factorization.

18494419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087924.

The product of its digits is 41472, while the sum is 40.

The square root of 18494419 is about 4300.5138065120. The cubic root of 18494419 is about 264.4520253707.

The spelling of 18494419 in words is "eighteen million, four hundred ninety-four thousand, four hundred nineteen".