42222020 has 48 divisors (see below), whose sum is σ = 93139200. Its totient is φ = 16046976.

The previous prime is 42221989. The next prime is 42222023. The reversal of 42222020 is 2022224.

It is a junction number, because it is equal to n+sod(n) for n = 42221986 and 42222004.

It is not an unprimeable number, because it can be changed into a prime (42222023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120806 + ... + 121154.

It is an arithmetic number, because the mean of its divisors is an integer number (1940400).

Almost surely, 2^42222020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46569600).

42222020 is an abundant number, since it is smaller than the sum of its proper divisors (50917180).

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

42222020 is a wasteful number, since it uses less digits than its factorization.

42222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 42222020 is about 6497.8473358490. The cubic root of 42222020 is about 348.2140863516.

Adding to 42222020 its reverse (2022224), we get a palindrome (44244244).

The spelling of 42222020 in words is "forty-two million, two hundred twenty-two thousand, twenty".