18315716 has 6 divisors (see below), whose sum is σ = 32052510. Its totient is φ = 9157856.

The previous prime is 18315697. The next prime is 18315727. The reversal of 18315716 is 61751381.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 6482116 = 3440^2 + 2546^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2289461 + ... + 2289468.

It is an arithmetic number, because the mean of its divisors is an integer number (5342085).

Almost surely, 2^18315716 is an apocalyptic number.

It is an amenable number.

18315716 is a deficient number, since it is larger than the sum of its proper divisors (13736794).

18315716 is a wasteful number, since it uses less digits than its factorization.

18315716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578933 (or 4578931 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 18315716 is about 4279.6864371120. The cubic root of 18315716 is about 263.5975080415.

The spelling of 18315716 in words is "eighteen million, three hundred fifteen thousand, seven hundred sixteen".