19928323 has 4 divisors (see below), whose sum is σ = 20029680. Its totient is φ = 19826968.

The previous prime is 19928309. The next prime is 19928333. The reversal of 19928323 is 32382991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19928323 - 2⁹ = 19927811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19928333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50383 + ... + 50776.

It is an arithmetic number, because the mean of its divisors is an integer number (5007420).

Almost surely, 2^19928323 is an apocalyptic number.

19928323 is a deficient number, since it is larger than the sum of its proper divisors (101357).

19928323 is a wasteful number, since it uses less digits than its factorization.

19928323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101356.

The product of its digits is 23328, while the sum is 37.

The square root of 19928323 is about 4464.1150298799. The cubic root of 19928323 is about 271.1171046569.

The spelling of 19928323 in words is "nineteen million, nine hundred twenty-eight thousand, three hundred twenty-three".