2021940706 has 4 divisors (see below), whose sum is σ = 3032911062. Its totient is φ = 1010970352.

The previous prime is 2021940691. The next prime is 2021940733. The reversal of 2021940706 is 6070491202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1780418025 + 241522681 = 42195^2 + 15541^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505485175 + ... + 505485178.

Almost surely, 2^2021940706 is an apocalyptic number.

2021940706 is a deficient number, since it is larger than the sum of its proper divisors (1010970356).

2021940706 is a wasteful number, since it uses less digits than its factorization.

2021940706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010970355.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2021940706 is about 44965.9949962191. The cubic root of 2021940706 is about 1264.5115636328.

The spelling of 2021940706 in words is "two billion, twenty-one million, nine hundred forty thousand, seven hundred six".