18009116 has 12 divisors (see below), whose sum is σ = 32602920. Its totient is φ = 8694000.

The previous prime is 18009107. The next prime is 18009119. The reversal of 18009116 is 61190081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77510 + ... + 77741.

It is an arithmetic number, because the mean of its divisors is an integer number (2716910).

Almost surely, 2^18009116 is an apocalyptic number.

It is an amenable number.

18009116 is a deficient number, since it is larger than the sum of its proper divisors (14593804).

18009116 is a wasteful number, since it uses less digits than its factorization.

18009116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155284 (or 155282 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 18009116 is about 4243.7148820344. The cubic root of 18009116 is about 262.1183739516.

Adding to 18009116 its reverse (61190081), we get a palindrome (79199197).

The spelling of 18009116 in words is "eighteen million, nine thousand, one hundred sixteen".