2021086664 has 16 divisors (see below), whose sum is σ = 3911781120. Its totient is φ = 977945040.

The previous prime is 2021086651. The next prime is 2021086729. The reversal of 2021086664 is 4666801202.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4074524 + ... + 4075019.

It is an arithmetic number, because the mean of its divisors is an integer number (244486320).

Almost surely, 2^2021086664 is an apocalyptic number.

It is an amenable number.

2021086664 is a deficient number, since it is larger than the sum of its proper divisors (1890694456).

2021086664 is a wasteful number, since it uses less digits than its factorization.

2021086664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8149580 (or 8149576 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 2021086664 is about 44956.4974614349. The cubic root of 2021086664 is about 1264.3335007007. Note that the first 3 decimals are identical.

Adding to 2021086664 its reverse (4666801202), we get a palindrome (6687887866).

The spelling of 2021086664 in words is "two billion, twenty-one million, eighty-six thousand, six hundred sixty-four".