2019490013 has 4 divisors (see below), whose sum is σ = 2021468988. Its totient is φ = 2017511040.

The previous prime is 2019489949. The next prime is 2019490043. The reversal of 2019490013 is 3100949102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1207354009 + 812136004 = 34747^2 + 28498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2019490013 - 2⁶ = 2019489949 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 (2019490043) 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, 987956 + ... + 989997.

It is an arithmetic number, because the mean of its divisors is an integer number (505367247).

Almost surely, 2^2019490013 is an apocalyptic number.

It is an amenable number.

2019490013 is a deficient number, since it is larger than the sum of its proper divisors (1978975).

2019490013 is a wasteful number, since it uses less digits than its factorization.

2019490013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978974.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2019490013 is about 44938.7362194355. The cubic root of 2019490013 is about 1264.0004733898. Note that the first 3 decimals are identical.

The spelling of 2019490013 in words is "two billion, nineteen million, four hundred ninety thousand, thirteen".