19928293 has 8 divisors (see below), whose sum is σ = 24845760. Its totient is φ = 15528480.

The previous prime is 19928287. The next prime is 19928297. The reversal of 19928293 is 39282991.

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

It is not a de Polignac number, because 19928293 - 2⁵ = 19928261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19928297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129328 + ... + 129481.

It is an arithmetic number, because the mean of its divisors is an integer number (3105720).

Almost surely, 2^19928293 is an apocalyptic number.

It is an amenable number.

19928293 is a deficient number, since it is larger than the sum of its proper divisors (4917467).

19928293 is a wasteful number, since it uses less digits than its factorization.

19928293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258827.

The product of its digits is 69984, while the sum is 43.

The square root of 19928293 is about 4464.1116697502. Note that the first 3 decimals coincide. The cubic root of 19928293 is about 271.1169686107.

The spelling of 19928293 in words is "nineteen million, nine hundred twenty-eight thousand, two hundred ninety-three".