20222222220 has 72 divisors (see below), whose sum is σ = 62030011680. Its totient is φ = 5331997440.

The previous prime is 20222222213. The next prime is 20222222221. The reversal of 20222222220 is 2222222202.

20222222220 is a `hidden beast` number, since 2 + 0 + 222 + 222 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20222222193 and 20222222202.

It is not an unprimeable number, because it can be changed into a prime (20222222221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 615136 + ... + 647175.

It is an arithmetic number, because the mean of its divisors is an integer number (861527940).

Almost surely, 2^20222222220 is an apocalyptic number.

20222222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20222222220 is an abundant number, since it is smaller than the sum of its proper divisors (41807789460).

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

20222222220 is a wasteful number, since it uses less digits than its factorization.

20222222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262415 (or 1262410 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Subtracting from 20222222220 its sum of digits (18), we obtain a palindrome (20222222202).

Adding to 20222222220 its reverse (2222222202), we get a palindrome (22444444422).

The spelling of 20222222220 in words is "twenty billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".