18009045 has 48 divisors (see below), whose sum is σ = 32864832. Its totient is φ = 9112320.

The previous prime is 18009031. The next prime is 18009049. The reversal of 18009045 is 54090081.

It is not a de Polignac number, because 18009045 - 2⁷ = 18008917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009049) 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 47 ways as a sum of consecutive naturals, for example, 79222 + ... + 79448.

It is an arithmetic number, because the mean of its divisors is an integer number (684684).

Almost surely, 2^18009045 is an apocalyptic number.

18009045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18009045 is a deficient number, since it is larger than the sum of its proper divisors (14855787).

18009045 is a wasteful number, since it uses less digits than its factorization.

18009045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18009045 is about 4243.7065167139. The cubic root of 18009045 is about 262.1180294885.

The spelling of 18009045 in words is "eighteen million, nine thousand, forty-five".