19689693 has 8 divisors (see below), whose sum is σ = 26453856. Its totient is φ = 13026000.

The previous prime is 19689671. The next prime is 19689697. The reversal of 19689693 is 39698691.

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

It is not a de Polignac number, because 19689693 - 2¹⁷ = 19558621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19689697) 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 7 ways as a sum of consecutive naturals, for example, 24658 + ... + 25443.

It is an arithmetic number, because the mean of its divisors is an integer number (3306732).

Almost surely, 2^19689693 is an apocalyptic number.

It is an amenable number.

19689693 is a deficient number, since it is larger than the sum of its proper divisors (6764163).

19689693 is a wasteful number, since it uses less digits than its factorization.

19689693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50235.

The product of its digits is 629856, while the sum is 51.

The square root of 19689693 is about 4437.3069535474. The cubic root of 19689693 is about 270.0306000984.

The spelling of 19689693 in words is "nineteen million, six hundred eighty-nine thousand, six hundred ninety-three".