2021689206 has 40 divisors (see below), whose sum is σ = 4604367504. Its totient is φ = 662845680.

The previous prime is 2021689199. The next prime is 2021689207. The reversal of 2021689206 is 6029861202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021689207) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92410 + ... + 112173.

Almost surely, 2^2021689206 is an apocalyptic number.

2021689206 is an abundant number, since it is smaller than the sum of its proper divisors (2582678298).

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

2021689206 is a wasteful number, since it uses less digits than its factorization.

2021689206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204658 (or 204649 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2021689206 is about 44963.1983515408. The cubic root of 2021689206 is about 1264.4591325132.

The spelling of 2021689206 in words is "two billion, twenty-one million, six hundred eighty-nine thousand, two hundred six".