22012220920 has 32 divisors (see below), whose sum is σ = 49533667920. Its totient is φ = 8803791360.

The previous prime is 22012220897. The next prime is 22012220921. The reversal of 22012220920 is 2902221022.

It is a junction number, because it is equal to n+sod(n) for n = 22012220891 and 22012220900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012220921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341680 + ... + 400960.

Almost surely, 2^22012220920 is an apocalyptic number.

22012220920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012220920 is an abundant number, since it is smaller than the sum of its proper divisors (27521447000).

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

22012220920 is a wasteful number, since it uses less digits than its factorization.

22012220920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68575 (or 68571 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 22012220920 its reverse (2902221022), we get a palindrome (24914441942).

The spelling of 22012220920 in words is "twenty-two billion, twelve million, two hundred twenty thousand, nine hundred twenty".