42020037844 has 12 divisors (see below), whose sum is σ = 77860658484. Its totient is φ = 19774135424.

The previous prime is 42020037823. The next prime is 42020037853. The reversal of 42020037844 is 44873002024.

It can be written as a sum of positive squares in 2 ways, for example, as 19471411600 + 22548626244 = 139540^2 + 150162^2 .

It is a super-2 number, since 2×42020037844² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 308970799 + ... + 308970934.

It is an arithmetic number, because the mean of its divisors is an integer number (6488388207).

Almost surely, 2^42020037844 is an apocalyptic number.

It is an amenable number.

42020037844 is a deficient number, since it is larger than the sum of its proper divisors (35840620640).

42020037844 is a wasteful number, since it uses less digits than its factorization.

42020037844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617941754 (or 617941752 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

Adding to 42020037844 its reverse (44873002024), we get a palindrome (86893039868).

The spelling of 42020037844 in words is "forty-two billion, twenty million, thirty-seven thousand, eight hundred forty-four".