2021579984 has 20 divisors (see below), whose sum is σ = 4007901216. Its totient is φ = 987282912.

The previous prime is 2021579983. The next prime is 2021580023. The reversal of 2021579984 is 4899751202.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021579981) 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, 1468484 + ... + 1469859.

Almost surely, 2^2021579984 is an apocalyptic number.

It is an amenable number.

2021579984 is a deficient number, since it is larger than the sum of its proper divisors (1986321232).

2021579984 is a wasteful number, since it uses less digits than its factorization.

2021579984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938394 (or 2938388 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 2021579984 is about 44961.9837640645. The cubic root of 2021579984 is about 1264.4363612514.

The spelling of 2021579984 in words is "two billion, twenty-one million, five hundred seventy-nine thousand, nine hundred eighty-four".