18009128 has 16 divisors (see below), whose sum is σ = 33912000. Its totient is φ = 8965936.

The previous prime is 18009119. The next prime is 18009133. The reversal of 18009128 is 82190081.

It is a self number, because there is not a number n which added to its sum of digits gives 18009128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798 + ... + 6621.

It is an arithmetic number, because the mean of its divisors is an integer number (2119500).

Almost surely, 2^18009128 is an apocalyptic number.

It is an amenable number.

18009128 is a deficient number, since it is larger than the sum of its proper divisors (15902872).

18009128 is a wasteful number, since it uses less digits than its factorization.

18009128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9664 (or 9660 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 18009128 is about 4243.7162958897. The cubic root of 18009128 is about 262.1184321706.

The spelling of 18009128 in words is "eighteen million, nine thousand, one hundred twenty-eight".