19920393 has 24 divisors (see below), whose sum is σ = 29813888. Its totient is φ = 12807072.

The previous prime is 19920391. The next prime is 19920401. The reversal of 19920393 is 39302991.

It is not a de Polignac number, because 19920393 - 2¹ = 19920391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19920391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54096 + ... + 54462.

Almost surely, 2^19920393 is an apocalyptic number.

It is an amenable number.

19920393 is a deficient number, since it is larger than the sum of its proper divisors (9893495).

19920393 is a wasteful number, since it uses less digits than its factorization.

19920393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 19920393 is about 4463.2267475449. The cubic root of 19920393 is about 271.0811383611.

The spelling of 19920393 in words is "nineteen million, nine hundred twenty thousand, three hundred ninety-three".