18616996 has 12 divisors (see below), whose sum is σ = 32625180. Its totient is φ = 9295520.

The previous prime is 18616987. The next prime is 18616999. The reversal of 18616996 is 69961681.

It can be written as a sum of positive squares in 2 ways, for example, as 4778596 + 13838400 = 2186^2 + 3720^2 .

It is not an unprimeable number, because it can be changed into a prime (18616999) 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, 450 + ... + 6118.

It is an arithmetic number, because the mean of its divisors is an integer number (2718765).

Almost surely, 2^18616996 is an apocalyptic number.

It is an amenable number.

18616996 is a deficient number, since it is larger than the sum of its proper divisors (14008184).

18616996 is a wasteful number, since it uses less digits than its factorization.

18616996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494 (or 6492 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 18616996 is about 4314.7417072172. The cubic root of 18616996 is about 265.0349829217.

The spelling of 18616996 in words is "eighteen million, six hundred sixteen thousand, nine hundred ninety-six".