19027993 has 4 divisors (see below), whose sum is σ = 19127808. Its totient is φ = 18928180.

The previous prime is 19027979. The next prime is 19028003. The reversal of 19027993 is 39972091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19027993 - 2¹³ = 19019801 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19021993) 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, 49621 + ... + 50002.

It is an arithmetic number, because the mean of its divisors is an integer number (4781952).

Almost surely, 2^19027993 is an apocalyptic number.

It is an amenable number.

19027993 is a deficient number, since it is larger than the sum of its proper divisors (99815).

19027993 is an equidigital number, since it uses as much as digits as its factorization.

19027993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99814.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 19027993 is about 4362.1087790196. The cubic root of 19027993 is about 266.9711471765.

The spelling of 19027993 in words is "nineteen million, twenty-seven thousand, nine hundred ninety-three".