18289316 has 12 divisors (see below), whose sum is σ = 32457600. Its totient is φ = 9015720.

The previous prime is 18289307. The next prime is 18289357. The reversal of 18289316 is 61398281.

It is a self number, because there is not a number n which added to its sum of digits gives 18289316.

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, 31916 + ... + 32483.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^18289316 is an apocalyptic number.

It is an amenable number.

18289316 is a deficient number, since it is larger than the sum of its proper divisors (14168284).

18289316 is a wasteful number, since it uses less digits than its factorization.

18289316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64474 (or 64472 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 18289316 is about 4276.6009867651. The cubic root of 18289316 is about 263.4707986368.

It can be divided in two parts, 182 and 89316, that added together give a palindrome (89498).

The spelling of 18289316 in words is "eighteen million, two hundred eighty-nine thousand, three hundred sixteen".