2019874649 has 12 divisors (see below), whose sum is σ = 2192071356. Its totient is φ = 1860348672.

The previous prime is 2019874643. The next prime is 2019874663. The reversal of 2019874649 is 9464789102.

It can be written as a sum of positive squares in 6 ways, for example, as 304258249 + 1715616400 = 17443^2 + 41420^2 .

It is not a de Polignac number, because 2019874649 - 2¹² = 2019870553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2019874597 and 2019874606.

It is not an unprimeable number, because it can be changed into a prime (2019874643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64157 + ... + 90309.

It is an arithmetic number, because the mean of its divisors is an integer number (182672613).

Almost surely, 2^2019874649 is an apocalyptic number.

It is an amenable number.

2019874649 is a deficient number, since it is larger than the sum of its proper divisors (172196707).

2019874649 is a wasteful number, since it uses less digits than its factorization.

2019874649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26636 (or 26623 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2019874649 is about 44943.0155752816. The cubic root of 2019874649 is about 1264.0807162927.

The spelling of 2019874649 in words is "two billion, nineteen million, eight hundred seventy-four thousand, six hundred forty-nine".