42042022420 has 24 divisors (see below), whose sum is σ = 88492164264. Its totient is φ = 16777967616.

The previous prime is 42042022411. The next prime is 42042022441. The reversal of 42042022420 is 2422024024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1036582416 + 41005440004 = 32196^2 + 202498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42042022391 and 42042022400.

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 7 ways as a sum of consecutive naturals, for example, 2418709 + ... + 2436028.

It is an arithmetic number, because the mean of its divisors is an integer number (3687173511).

Almost surely, 2^42042022420 is an apocalyptic number.

It is an amenable number.

42042022420 is an abundant number, since it is smaller than the sum of its proper divisors (46450141844).

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

42042022420 is a wasteful number, since it uses less digits than its factorization.

42042022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855179 (or 4855177 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 42042022420 its reverse (2422024024), we get a palindrome (44464046444).

The spelling of 42042022420 in words is "forty-two billion, forty-two million, twenty-two thousand, four hundred twenty".