19638116 has 12 divisors (see below), whose sum is σ = 34540800. Its totient is φ = 9769320.

The previous prime is 19638107. The next prime is 19638121. The reversal of 19638116 is 61183691.

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 in 3 ways as a sum of consecutive naturals, for example, 11540 + ... + 13131.

It is an arithmetic number, because the mean of its divisors is an integer number (2878400).

Almost surely, 2^19638116 is an apocalyptic number.

It is an amenable number.

19638116 is a deficient number, since it is larger than the sum of its proper divisors (14902684).

19638116 is a wasteful number, since it uses less digits than its factorization.

19638116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24874 (or 24872 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 19638116 is about 4431.4913968099. The cubic root of 19638116 is about 269.7946128932.

The spelling of 19638116 in words is "nineteen million, six hundred thirty-eight thousand, one hundred sixteen".