19928713 has 16 divisors (see below), whose sum is σ = 23777280. Its totient is φ = 16341696.

The previous prime is 19928707. The next prime is 19928719. The reversal of 19928713 is 31782991.

It is an interprime number because it is at equal distance from previous prime (19928707) and next prime (19928719).

It is not a de Polignac number, because 19928713 - 2⁹ = 19928201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19928719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25395 + ... + 26167.

It is an arithmetic number, because the mean of its divisors is an integer number (1486080).

Almost surely, 2^19928713 is an apocalyptic number.

It is an amenable number.

19928713 is a deficient number, since it is larger than the sum of its proper divisors (3848567).

19928713 is a wasteful number, since it uses less digits than its factorization.

19928713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its digits is 27216, while the sum is 40.

The square root of 19928713 is about 4464.1587113363. The cubic root of 19928713 is about 271.1188732449.

The spelling of 19928713 in words is "nineteen million, nine hundred twenty-eight thousand, seven hundred thirteen".