19928411 has 4 divisors (see below), whose sum is σ = 20125824. Its totient is φ = 19731000.

The previous prime is 19928401. The next prime is 19928453. The reversal of 19928411 is 11482991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11482991 = 13 ⋅883307.

It is a cyclic number.

It is not a de Polignac number, because 19928411 - 2⁶ = 19928347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19928401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98555 + ... + 98756.

It is an arithmetic number, because the mean of its divisors is an integer number (5031456).

Almost surely, 2^19928411 is an apocalyptic number.

19928411 is a deficient number, since it is larger than the sum of its proper divisors (197413).

19928411 is a wasteful number, since it uses less digits than its factorization.

19928411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197412.

The product of its digits is 5184, while the sum is 35.

The square root of 19928411 is about 4464.1248862459. The cubic root of 19928411 is about 271.1175037249.

The spelling of 19928411 in words is "nineteen million, nine hundred twenty-eight thousand, four hundred eleven".