42004124020 has 12 divisors (see below), whose sum is σ = 88208660484. Its totient is φ = 16801649600.

The previous prime is 42004123969. The next prime is 42004124027. The reversal of 42004124020 is 2042140024.

It can be written as a sum of positive squares in 2 ways, for example, as 29701764964 + 12302359056 = 172342^2 + 110916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004124027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050103081 + ... + 1050103120.

It is an arithmetic number, because the mean of its divisors is an integer number (7350721707).

Almost surely, 2^42004124020 is an apocalyptic number.

It is an amenable number.

42004124020 is an abundant number, since it is smaller than the sum of its proper divisors (46204536464).

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

42004124020 is a wasteful number, since it uses less digits than its factorization.

42004124020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100206210 (or 2100206208 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 42004124020 its reverse (2042140024), we get a palindrome (44046264044).

The spelling of 42004124020 in words is "forty-two billion, four million, one hundred twenty-four thousand, twenty".