19688345 has 8 divisors (see below), whose sum is σ = 24653376. Its totient is φ = 15065776.

The previous prime is 19688311. The next prime is 19688353. The reversal of 19688345 is 54388691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19688345 - 2¹⁰ = 19687321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19688296 and 19688305.

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 7 ways as a sum of consecutive naturals, for example, 85487 + ... + 85716.

It is an arithmetic number, because the mean of its divisors is an integer number (3081672).

Almost surely, 2^19688345 is an apocalyptic number.

It is an amenable number.

19688345 is a deficient number, since it is larger than the sum of its proper divisors (4965031).

19688345 is a wasteful number, since it uses less digits than its factorization.

19688345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171231.

The product of its digits is 207360, while the sum is 44.

The square root of 19688345 is about 4437.1550570157. The cubic root of 19688345 is about 270.0244376601.

The spelling of 19688345 in words is "nineteen million, six hundred eighty-eight thousand, three hundred forty-five".