19688045 has 16 divisors (see below), whose sum is σ = 25536000. Its totient is φ = 14485824.

The previous prime is 19688041. The next prime is 19688051. The reversal of 19688045 is 54088691.

It is a cyclic number.

It is not a de Polignac number, because 19688045 - 2² = 19688041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19687993 and 19688011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19688041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32132 + ... + 32738.

It is an arithmetic number, because the mean of its divisors is an integer number (1596000).

Almost surely, 2^19688045 is an apocalyptic number.

It is an amenable number.

19688045 is a deficient number, since it is larger than the sum of its proper divisors (5847955).

19688045 is a wasteful number, since it uses less digits than its factorization.

19688045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 19688045 is about 4437.1212514422. The cubic root of 19688045 is about 270.0230661593.

The spelling of 19688045 in words is "nineteen million, six hundred eighty-eight thousand, forty-five".