22022222220 has 48 divisors (see below), whose sum is σ = 68513581920. Its totient is φ = 5872592448.

The previous prime is 22022222197. The next prime is 22022222269. The reversal of 22022222220 is 2222222022.

22022222220 is a `hidden beast` number, since 220 + 2 + 2 + 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 = 22022222193 and 22022222202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20390407 + ... + 20391486.

It is an arithmetic number, because the mean of its divisors is an integer number (1427366290).

Almost surely, 2^22022222220 is an apocalyptic number.

22022222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22022222220 is an abundant number, since it is smaller than the sum of its proper divisors (46491359700).

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

22022222220 is a wasteful number, since it uses less digits than its factorization.

22022222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40781911 (or 40781903 counting only the distinct ones).

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

Adding to 22022222220 its reverse (2222222022), we get a palindrome (24244444242).

The spelling of 22022222220 in words is "twenty-two billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty".