22222020 has 96 divisors (see below), whose sum is σ = 66487680. Its totient is φ = 5529600.

The previous prime is 22221977. The next prime is 22222049. The reversal of 22222020 is 2022222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22221987 and 22222005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115044 + ... + 115236.

It is an arithmetic number, because the mean of its divisors is an integer number (692580).

Almost surely, 2^22222020 is an apocalyptic number.

22222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33243840).

22222020 is an abundant number, since it is smaller than the sum of its proper divisors (44265660).

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

22222020 is a wasteful number, since it uses less digits than its factorization.

22222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22222020 is about 4714.0237589558. The cubic root of 22222020 is about 281.1433689605.

Adding to 22222020 its reverse (2022222), we get a palindrome (24244242).

The spelling of 22222020 in words is "twenty-two million, two hundred twenty-two thousand, twenty".