18494289 has 24 divisors (see below), whose sum is σ = 29484000. Its totient is φ = 11077440.

The previous prime is 18494279. The next prime is 18494299. The reversal of 18494289 is 98249481.

It is an interprime number because it is at equal distance from previous prime (18494279) and next prime (18494299).

It is not a de Polignac number, because 18494289 - 2⁸ = 18494033 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18494279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7762 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^18494289 is an apocalyptic number.

It is an amenable number.

18494289 is a deficient number, since it is larger than the sum of its proper divisors (10989711).

18494289 is a wasteful number, since it uses less digits than its factorization.

18494289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205 (or 2202 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 18494289 is about 4300.4986920124. The cubic root of 18494289 is about 264.4514057451.

The spelling of 18494289 in words is "eighteen million, four hundred ninety-four thousand, two hundred eighty-nine".