42242020 has 24 divisors (see below), whose sum is σ = 89780544. Its totient is φ = 16692576.

The previous prime is 42242017. The next prime is 42242021. The reversal of 42242020 is 2024224.

It is a junction number, because it is equal to n+sod(n) for n = 42241985 and 42242003.

It is not an unprimeable number, because it can be changed into a prime (42242021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11064 + ... + 14383.

It is an arithmetic number, because the mean of its divisors is an integer number (3740856).

It is a self-describing number.

Almost surely, 2^42242020 is an apocalyptic number.

It is an amenable number.

42242020 is an abundant number, since it is smaller than the sum of its proper divisors (47538524).

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

42242020 is a wasteful number, since it uses less digits than its factorization.

42242020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25539 (or 25537 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 42242020 is about 6499.3861248583. The cubic root of 42242020 is about 348.2690591074.

Adding to 42242020 its reverse (2024224), we get a palindrome (44266244).

The spelling of 42242020 in words is "forty-two million, two hundred forty-two thousand, twenty".