18494005 has 4 divisors (see below), whose sum is σ = 22192812. Its totient is φ = 14795200.

The previous prime is 18493997. The next prime is 18494033. The reversal of 18494005 is 50049481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8514724 + 9979281 = 2918^2 + 3159^2 .

It is not a de Polignac number, because 18494005 - 2³ = 18493997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1849396 + ... + 1849405.

It is an arithmetic number, because the mean of its divisors is an integer number (5548203).

Almost surely, 2^18494005 is an apocalyptic number.

It is an amenable number.

18494005 is a deficient number, since it is larger than the sum of its proper divisors (3698807).

18494005 is an equidigital number, since it uses as much as digits as its factorization.

18494005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698806.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18494005 is about 4300.4656724592. The cubic root of 18494005 is about 264.4500520915.

The spelling of 18494005 in words is "eighteen million, four hundred ninety-four thousand, five".