4042020042 has 20 divisors (see below), whose sum is σ = 9057119346. Its totient is φ = 1347339960.

The previous prime is 4042020041. The next prime is 4042020049. The reversal of 4042020042 is 2400202404.

4042020042 is a `hidden beast` number, since 4 + 0 + 420 + 200 + 42 = 666.

4042020042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3913628481 + 128391561 = 62559^2 + 11331^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4042019997 and 4042020024.

It is not an unprimeable number, because it can be changed into a prime (4042020041) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12475209 + ... + 12475532.

Almost surely, 2^4042020042 is an apocalyptic number.

4042020042 is an abundant number, since it is smaller than the sum of its proper divisors (5015099304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4042020042 is a wasteful number, since it uses less digits than its factorization.

4042020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24950755 (or 24950746 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4042020042 is about 63576.8829213890. The cubic root of 4042020042 is about 1592.9402554546.

Adding to 4042020042 its reverse (2400202404), we get a palindrome (6442222446).

The spelling of 4042020042 in words is "four billion, forty-two million, twenty thousand, forty-two".