2021209976 has 8 divisors (see below), whose sum is σ = 3789768720. Its totient is φ = 1010604984.

The previous prime is 2021209921. The next prime is 2021210011. The reversal of 2021209976 is 6799021202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126325616 + ... + 126325631.

It is an arithmetic number, because the mean of its divisors is an integer number (473721090).

Almost surely, 2^2021209976 is an apocalyptic number.

It is an amenable number.

2021209976 is a deficient number, since it is larger than the sum of its proper divisors (1768558744).

2021209976 is a wasteful number, since it uses less digits than its factorization.

2021209976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252651253 (or 252651249 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2021209976 is about 44957.8688996709. The cubic root of 2021209976 is about 1264.3592136541.

The spelling of 2021209976 in words is "two billion, twenty-one million, two hundred nine thousand, nine hundred seventy-six".