18744494 has 8 divisors (see below), whose sum is σ = 29339280. Its totient is φ = 8964736.

The previous prime is 18744487. The next prime is 18744529. The reversal of 18744494 is 49444781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 203699 + ... + 203790.

It is an arithmetic number, because the mean of its divisors is an integer number (3667410).

Almost surely, 2^18744494 is an apocalyptic number.

18744494 is a deficient number, since it is larger than the sum of its proper divisors (10594786).

18744494 is a wasteful number, since it uses less digits than its factorization.

18744494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407514.

The product of its digits is 129024, while the sum is 41.

The square root of 18744494 is about 4329.4911941243. The cubic root of 18744494 is about 265.6386353139.

The spelling of 18744494 in words is "eighteen million, seven hundred forty-four thousand, four hundred ninety-four".