2021716864 has 32 divisors (see below), whose sum is σ = 4030173000. Its totient is φ = 1010222592.

The previous prime is 2021716841. The next prime is 2021716867. The reversal of 2021716864 is 4686171202.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021716867) 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, 250362 + ... + 258310.

Almost surely, 2^2021716864 is an apocalyptic number.

It is an amenable number.

2021716864 is a deficient number, since it is larger than the sum of its proper divisors (2008456136).

2021716864 is an equidigital number, since it uses as much as digits as its factorization.

2021716864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2021716864 is about 44963.5059131291. The cubic root of 2021716864 is about 1264.4648986899.

The spelling of 2021716864 in words is "two billion, twenty-one million, seven hundred sixteen thousand, eight hundred sixty-four".