18090316 has 24 divisors (see below), whose sum is σ = 32926320. Its totient is φ = 8686272.

The previous prime is 18090301. The next prime is 18090341. The reversal of 18090316 is 61309081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31851 + ... + 32413.

It is an arithmetic number, because the mean of its divisors is an integer number (1371930).

Almost surely, 2^18090316 is an apocalyptic number.

It is an amenable number.

18090316 is a deficient number, since it is larger than the sum of its proper divisors (14836004).

18090316 is a wasteful number, since it uses less digits than its factorization.

18090316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 18090316 is about 4253.2712116676. The cubic root of 18090316 is about 262.5117322043.

Adding to 18090316 its reverse (61309081), we get a palindrome (79399397).

The spelling of 18090316 in words is "eighteen million, ninety thousand, three hundred sixteen".