19920392 has 16 divisors (see below), whose sum is σ = 38975040. Its totient is φ = 9527056.

The previous prime is 19920391. The next prime is 19920401. The reversal of 19920392 is 29302991.

It is not an unprimeable number, because it can be changed into a prime (19920391) 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 3 ways as a sum of consecutive naturals, for example, 53948 + ... + 54315.

It is an arithmetic number, because the mean of its divisors is an integer number (2435940).

Almost surely, 2^19920392 is an apocalyptic number.

It is an amenable number.

19920392 is a deficient number, since it is larger than the sum of its proper divisors (19054648).

19920392 is a wasteful number, since it uses less digits than its factorization.

19920392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108292 (or 108288 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 19920392 is about 4463.2266355183. The cubic root of 19920392 is about 271.0811338250.

The spelling of 19920392 in words is "nineteen million, nine hundred twenty thousand, three hundred ninety-two".