18059816 has 16 divisors (see below), whose sum is σ = 34060500. Its totient is φ = 8977024.

The previous prime is 18059813. The next prime is 18059819. The reversal of 18059816 is 61895081.

It is an interprime number because it is at equal distance from previous prime (18059813) and next prime (18059819).

It can be written as a sum of positive squares in 2 ways, for example, as 16728100 + 1331716 = 4090^2 + 1154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18059816.

It is not an unprimeable number, because it can be changed into a prime (18059813) 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, 5141 + ... + 7908.

Almost surely, 2^18059816 is an apocalyptic number.

It is an amenable number.

18059816 is a deficient number, since it is larger than the sum of its proper divisors (16000684).

18059816 is a wasteful number, since it uses less digits than its factorization.

18059816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13228 (or 13224 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18059816 is about 4249.6842235630. The cubic root of 18059816 is about 262.3641189412.

The spelling of 18059816 in words is "eighteen million, fifty-nine thousand, eight hundred sixteen".