19992993 has 8 divisors (see below), whose sum is σ = 26692800. Its totient is φ = 13310928.

The previous prime is 19992991. The next prime is 19993007. The reversal of 19992993 is 39929991.

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

It is not a de Polignac number, because 19992993 - 2¹ = 19992991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19992991) 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, 1533 + ... + 6506.

It is an arithmetic number, because the mean of its divisors is an integer number (3336600).

Almost surely, 2^19992993 is an apocalyptic number.

It is an amenable number.

19992993 is a deficient number, since it is larger than the sum of its proper divisors (6699807).

19992993 is an equidigital number, since it uses as much as digits as its factorization.

19992993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871.

The product of its digits is 354294, while the sum is 51.

The square root of 19992993 is about 4471.3524799550. The cubic root of 19992993 is about 271.4100580830.

The spelling of 19992993 in words is "nineteen million, nine hundred ninety-two thousand, nine hundred ninety-three".