18744045 has 8 divisors (see below), whose sum is σ = 29990496. Its totient is φ = 9996816.

The previous prime is 18744041. The next prime is 18744067. The reversal of 18744045 is 54044781.

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

It is not a de Polignac number, because 18744045 - 2² = 18744041 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18743997 and 18744015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18744041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624787 + ... + 624816.

It is an arithmetic number, because the mean of its divisors is an integer number (3748812).

Almost surely, 2^18744045 is an apocalyptic number.

18744045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18744045 is a deficient number, since it is larger than the sum of its proper divisors (11246451).

18744045 is a wasteful number, since it uses less digits than its factorization.

18744045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249611.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 18744045 is about 4329.4393401456. The cubic root of 18744045 is about 265.6365142875.

The spelling of 18744045 in words is "eighteen million, seven hundred forty-four thousand, forty-five".