18009134 has 16 divisors (see below), whose sum is σ = 31736880. Its totient is φ = 7556160.

The previous prime is 18009133. The next prime is 18009143. The reversal of 18009134 is 43190081.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31199 + ... + 31770.

It is an arithmetic number, because the mean of its divisors is an integer number (1983555).

Almost surely, 2^18009134 is an apocalyptic number.

18009134 is a deficient number, since it is larger than the sum of its proper divisors (13727746).

18009134 is a wasteful number, since it uses less digits than its factorization.

18009134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62995.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18009134 is about 4243.7170028172. The cubic root of 18009134 is about 262.1184612801.

The spelling of 18009134 in words is "eighteen million, nine thousand, one hundred thirty-four".