18313316 has 12 divisors (see below), whose sum is σ = 36626688. Its totient is φ = 7848552.

The previous prime is 18313307. The next prime is 18313327. The reversal of 18313316 is 61331381.

It is a happy number.

18313316 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 326996 + ... + 327051.

It is an arithmetic number, because the mean of its divisors is an integer number (3052224).

It is a self-describing number.

Almost surely, 2^18313316 is an apocalyptic number.

It is an amenable number.

18313316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18313316 is a wasteful number, since it uses less digits than its factorization.

18313316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654058 (or 654056 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 18313316 is about 4279.4060335519. The cubic root of 18313316 is about 263.5859940380.

Adding to 18313316 its reverse (61331381), we get a palindrome (79644697).

The spelling of 18313316 in words is "eighteen million, three hundred thirteen thousand, three hundred sixteen".