19683813 has 8 divisors (see below), whose sum is σ = 26885376. Its totient is φ = 12802400.

The previous prime is 19683799. The next prime is 19683817. The reversal of 19683813 is 31838691.

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 19683813 - 2²⁰ = 18635237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19683817) 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, 79893 + ... + 80138.

It is an arithmetic number, because the mean of its divisors is an integer number (3360672).

Almost surely, 2^19683813 is an apocalyptic number.

It is an amenable number.

19683813 is a deficient number, since it is larger than the sum of its proper divisors (7201563).

19683813 is a wasteful number, since it uses less digits than its factorization.

19683813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160075.

The product of its digits is 31104, while the sum is 39.

The square root of 19683813 is about 4436.6443400390. The cubic root of 19683813 is about 270.0037173699.

The spelling of 19683813 in words is "nineteen million, six hundred eighty-three thousand, eight hundred thirteen".