18730044 has 18 divisors (see below), whose sum is σ = 47345480. Its totient is φ = 6243336.

The previous prime is 18730009. The next prime is 18730091. The reversal of 18730044 is 44003781.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 260104 + ... + 260175.

Almost surely, 2^18730044 is an apocalyptic number.

It is an amenable number.

18730044 is an abundant number, since it is smaller than the sum of its proper divisors (28615436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18730044 is a wasteful number, since it uses less digits than its factorization.

18730044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520289 (or 520284 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18730044 is about 4327.8220850677. The cubic root of 18730044 is about 265.5703581075.

The spelling of 18730044 in words is "eighteen million, seven hundred thirty thousand, forty-four".