2020440643 has 16 divisors (see below), whose sum is σ = 2254230720. Its totient is φ = 1798038144.

The previous prime is 2020440629. The next prime is 2020440647. The reversal of 2020440643 is 3460440202.

It is a cyclic number.

It is not a de Polignac number, because 2020440643 - 2²¹ = 2018343491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020440647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 276505 + ... + 283717.

It is an arithmetic number, because the mean of its divisors is an integer number (140889420).

Almost surely, 2^2020440643 is an apocalyptic number.

2020440643 is a deficient number, since it is larger than the sum of its proper divisors (233790077).

2020440643 is a wasteful number, since it uses less digits than its factorization.

2020440643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 2020440643 is about 44949.3119302176. The cubic root of 2020440643 is about 1264.1987756460.

Adding to 2020440643 its reverse (3460440202), we get a palindrome (5480880845).

The spelling of 2020440643 in words is "two billion, twenty million, four hundred forty thousand, six hundred forty-three".