20202222220 has 12 divisors (see below), whose sum is σ = 42424666704. Its totient is φ = 8080888880.

The previous prime is 20202222217. The next prime is 20202222241. The reversal of 20202222220 is 2222220202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20202222194 and 20202222203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505055536 + ... + 505055575.

It is an arithmetic number, because the mean of its divisors is an integer number (3535388892).

Almost surely, 2^20202222220 is an apocalyptic number.

20202222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202222220 is an abundant number, since it is smaller than the sum of its proper divisors (22222444484).

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

20202222220 is a wasteful number, since it uses less digits than its factorization.

20202222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010111120 (or 1010111118 counting only the distinct ones).

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

Adding to 20202222220 its reverse (2222220202), we get a palindrome (22424442422).

The spelling of 20202222220 in words is "twenty billion, two hundred two million, two hundred twenty-two thousand, two hundred twenty".