2019990493 has 4 divisors (see below), whose sum is σ = 2054227680. Its totient is φ = 1985753308.

The previous prime is 2019990481. The next prime is 2019990509. The reversal of 2019990493 is 3940999102.

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 2019990493 - 2⁹ = 2019989981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019990593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17118505 + ... + 17118622.

It is an arithmetic number, because the mean of its divisors is an integer number (513556920).

Almost surely, 2^2019990493 is an apocalyptic number.

It is an amenable number.

2019990493 is a deficient number, since it is larger than the sum of its proper divisors (34237187).

2019990493 is an equidigital number, since it uses as much as digits as its factorization.

2019990493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34237186.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 2019990493 is about 44944.3043443772. The cubic root of 2019990493 is about 1264.1048817143.

The spelling of 2019990493 in words is "two billion, nineteen million, nine hundred ninety thousand, four hundred ninety-three".