2020644621 has 12 divisors (see below), whose sum is σ = 2929026048. Its totient is φ = 1342334664.

The previous prime is 2020644559. The next prime is 2020644641. The reversal of 2020644621 is 1264460202.

It is not a de Polignac number, because 2020644621 - 2¹⁴ = 2020628237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020644641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394125 + ... + 399218.

It is an arithmetic number, because the mean of its divisors is an integer number (244085504).

Almost surely, 2^2020644621 is an apocalyptic number.

It is an amenable number.

2020644621 is a deficient number, since it is larger than the sum of its proper divisors (908381427).

2020644621 is a wasteful number, since it uses less digits than its factorization.

2020644621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793632 (or 793629 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2020644621 is about 44951.5808509556. The cubic root of 2020644621 is about 1264.2413175310.

The spelling of 2020644621 in words is "two billion, twenty million, six hundred forty-four thousand, six hundred twenty-one".