2019639996 has 144 divisors (see below), whose sum is σ = 5771525760. Its totient is φ = 590163840.

The previous prime is 2019639991. The next prime is 2019639997. The reversal of 2019639996 is 6999369102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019639991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1412610 + ... + 1414038.

It is an arithmetic number, because the mean of its divisors is an integer number (40080040).

Almost surely, 2^2019639996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2019639996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2885762880).

2019639996 is an abundant number, since it is smaller than the sum of its proper divisors (3751885764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2019639996 is a wasteful number, since it uses less digits than its factorization.

2019639996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The square root of 2019639996 is about 44940.4049380955. The cubic root of 2019639996 is about 1264.0317641099.

The spelling of 2019639996 in words is "two billion, nineteen million, six hundred thirty-nine thousand, nine hundred ninety-six".