19685104 has 20 divisors (see below), whose sum is σ = 38952864. Its totient is φ = 9632768.

The previous prime is 19685087. The next prime is 19685123. The reversal of 19685104 is 40158691.

It is a self number, because there is not a number n which added to its sum of digits gives 19685104.

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 in 3 ways as a sum of consecutive naturals, for example, 12337 + ... + 13840.

Almost surely, 2^19685104 is an apocalyptic number.

It is an amenable number.

19685104 is a deficient number, since it is larger than the sum of its proper divisors (19267760).

19685104 is a wasteful number, since it uses less digits than its factorization.

19685104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232 (or 26226 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 19685104 is about 4436.7898304968. The cubic root of 19685104 is about 270.0096201419.

The spelling of 19685104 in words is "nineteen million, six hundred eighty-five thousand, one hundred four".