4020235543 has 4 divisors (see below), whose sum is σ = 4027952448. Its totient is φ = 4012518640.

The previous prime is 4020235537. The next prime is 4020235547. The reversal of 4020235543 is 3455320204.

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

It is a cyclic number.

It is not a de Polignac number, because 4020235543 - 2¹⁷ = 4020104471 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 (4020235547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857671 + ... + 3858712.

It is an arithmetic number, because the mean of its divisors is an integer number (1006988112).

Almost surely, 2^4020235543 is an apocalyptic number.

4020235543 is a deficient number, since it is larger than the sum of its proper divisors (7716905).

4020235543 is an equidigital number, since it uses as much as digits as its factorization.

4020235543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7716904.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 4020235543 is about 63405.3274023563. The cubic root of 4020235543 is about 1590.0733775453.

Adding to 4020235543 its reverse (3455320204), we get a palindrome (7475555747).

The spelling of 4020235543 in words is "four billion, twenty million, two hundred thirty-five thousand, five hundred forty-three".