4020543305 has 4 divisors (see below), whose sum is σ = 4824651972. Its totient is φ = 3216434640.

The previous prime is 4020543281. The next prime is 4020543349. The reversal of 4020543305 is 5033450204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2093245504 + 1927297801 = 45752^2 + 43901^2 .

It is not a de Polignac number, because 4020543305 - 2¹⁴ = 4020526921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402054326 + ... + 402054335.

It is an arithmetic number, because the mean of its divisors is an integer number (1206162993).

Almost surely, 2^4020543305 is an apocalyptic number.

It is an amenable number.

4020543305 is a deficient number, since it is larger than the sum of its proper divisors (804108667).

4020543305 is an equidigital number, since it uses as much as digits as its factorization.

4020543305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804108666.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 4020543305 is about 63407.7542970889. The cubic root of 4020543305 is about 1590.1139515921.

Adding to 4020543305 its reverse (5033450204), we get a palindrome (9053993509).

The spelling of 4020543305 in words is "four billion, twenty million, five hundred forty-three thousand, three hundred five".