2020542565 has 16 divisors (see below), whose sum is σ = 2571946992. Its totient is φ = 1518582784.

The previous prime is 2020542553. The next prime is 2020542569. The reversal of 2020542565 is 5652450202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 30758116 + 1989784449 = 5546^2 + 44607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020542565 - 2⁹ = 2020542053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020542569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26007 + ... + 68683.

It is an arithmetic number, because the mean of its divisors is an integer number (160746687).

Almost surely, 2^2020542565 is an apocalyptic number.

It is an amenable number.

2020542565 is a deficient number, since it is larger than the sum of its proper divisors (551404427).

2020542565 is a wasteful number, since it uses less digits than its factorization.

2020542565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43256.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 2020542565 is about 44950.4456596372. The cubic root of 2020542565 is about 1264.2200329728.

Adding to 2020542565 its reverse (5652450202), we get a palindrome (7672992767).

The spelling of 2020542565 in words is "two billion, twenty million, five hundred forty-two thousand, five hundred sixty-five".