18984916 has 6 divisors (see below), whose sum is σ = 33223610. Its totient is φ = 9492456.

The previous prime is 18984907. The next prime is 18984941. The reversal of 18984916 is 61948981.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 1795600 = 4146^2 + 1340^2 .

It is a congruent number.

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, 2373111 + ... + 2373118.

Almost surely, 2^18984916 is an apocalyptic number.

It is an amenable number.

18984916 is a deficient number, since it is larger than the sum of its proper divisors (14238694).

18984916 is a wasteful number, since it uses less digits than its factorization.

18984916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746233 (or 4746231 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 18984916 is about 4357.1683465297. The cubic root of 18984916 is about 266.7695318430.

It can be divided in two parts, 18984 and 916, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 18984916 in words is "eighteen million, nine hundred eighty-four thousand, nine hundred sixteen".