4042020423 has 32 divisors (see below), whose sum is σ = 6517158400. Its totient is φ = 2176782336.

The previous prime is 4042020413. The next prime is 4042020427. The reversal of 4042020423 is 3240202404.

It is not a de Polignac number, because 4042020423 - 2⁴ = 4042020407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4042020423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042020427) 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 31 ways as a sum of consecutive naturals, for example, 50763 + ... + 103251.

It is an arithmetic number, because the mean of its divisors is an integer number (203661200).

Almost surely, 2^4042020423 is an apocalyptic number.

4042020423 is a deficient number, since it is larger than the sum of its proper divisors (2475137977).

4042020423 is a wasteful number, since it uses less digits than its factorization.

4042020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52711.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 4042020423 is about 63576.8859177610. The cubic root of 4042020423 is about 1592.9403055046.

Adding to 4042020423 its reverse (3240202404), we get a palindrome (7282222827).

The spelling of 4042020423 in words is "four billion, forty-two million, twenty thousand, four hundred twenty-three".