18996616 has 16 divisors (see below), whose sum is σ = 37714140. Its totient is φ = 8939520.

The previous prime is 18996613. The next prime is 18996619. The reversal of 18996616 is 61669981.

It is an interprime number because it is at equal distance from previous prime (18996613) and next prime (18996619).

It can be written as a sum of positive squares in 2 ways, for example, as 18887716 + 108900 = 4346^2 + 330^2 .

It is not an unprimeable number, because it can be changed into a prime (18996613) by changing a digit.

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, 69705 + ... + 69976.

Almost surely, 2^18996616 is an apocalyptic number.

It is an amenable number.

18996616 is a deficient number, since it is larger than the sum of its proper divisors (18717524).

18996616 is a wasteful number, since it uses less digits than its factorization.

18996616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139704 (or 139700 counting only the distinct ones).

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

The square root of 18996616 is about 4358.5107548336. The cubic root of 18996616 is about 266.8243220523.

It can be divided in two parts, 1899 and 6616, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 18996616 in words is "eighteen million, nine hundred ninety-six thousand, six hundred sixteen".