19986793 has 8 divisors (see below), whose sum is σ = 21011328. Its totient is φ = 18975264.

The previous prime is 19986751. The next prime is 19986809. The reversal of 19986793 is 39768991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19986793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19986793.

It is not an unprimeable number, because it can be changed into a prime (19986193) 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, 21 + ... + 6322.

It is an arithmetic number, because the mean of its divisors is an integer number (2626416).

Almost surely, 2^19986793 is an apocalyptic number.

It is an amenable number.

19986793 is a deficient number, since it is larger than the sum of its proper divisors (1024535).

19986793 is a wasteful number, since it uses less digits than its factorization.

19986793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503.

The product of its digits is 734832, while the sum is 52.

The square root of 19986793 is about 4470.6591236640. The cubic root of 19986793 is about 271.3819996472.

The spelling of 19986793 in words is "nineteen million, nine hundred eighty-six thousand, seven hundred ninety-three".