2020542644 has 6 divisors (see below), whose sum is σ = 3535949634. Its totient is φ = 1010271320.

The previous prime is 2020542619. The next prime is 2020542647. The reversal of 2020542644 is 4462450202.

It can be written as a sum of positive squares in only one way, i.e., 1620062500 + 400480144 = 40250^2 + 20012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020542647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252567827 + ... + 252567834.

It is an arithmetic number, because the mean of its divisors is an integer number (589324939).

Almost surely, 2^2020542644 is an apocalyptic number.

It is an amenable number.

2020542644 is a deficient number, since it is larger than the sum of its proper divisors (1515406990).

2020542644 is a wasteful number, since it uses less digits than its factorization.

2020542644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505135665 (or 505135663 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 2020542644 is about 44950.4465383827. The cubic root of 2020542644 is about 1264.2200494491.

Adding to 2020542644 its reverse (4462450202), we get a palindrome (6482992846).

The spelling of 2020542644 in words is "two billion, twenty million, five hundred forty-two thousand, six hundred forty-four".