2021008864 has 24 divisors (see below), whose sum is σ = 4547270448. Its totient is φ = 866146560.

The previous prime is 2021008819. The next prime is 2021008867. The reversal of 2021008864 is 4688001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021008867) 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, 4510957 + ... + 4511404.

It is an arithmetic number, because the mean of its divisors is an integer number (189469602).

Almost surely, 2^2021008864 is an apocalyptic number.

It is an amenable number.

2021008864 is an abundant number, since it is smaller than the sum of its proper divisors (2526261584).

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

2021008864 is an equidigital number, since it uses as much as digits as its factorization.

2021008864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9022378 (or 9022370 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 2021008864 is about 44955.6321721762. The cubic root of 2021008864 is about 1264.3172773474.

The spelling of 2021008864 in words is "two billion, twenty-one million, eight thousand, eight hundred sixty-four".