22232122020 has 72 divisors (see below), whose sum is σ = 68105189880. Its totient is φ = 5869862400.

The previous prime is 22232122007. The next prime is 22232122027. The reversal of 22232122020 is 2022123222.

It can be written as a sum of positive squares in 4 ways, for example, as 1425213504 + 20806908516 = 37752^2 + 144246^2 .

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 = 22232121984 and 22232122002.

It is not an unprimeable number, because it can be changed into a prime (22232122027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 593265 + ... + 629624.

It is an arithmetic number, because the mean of its divisors is an integer number (945905415).

Almost surely, 2^22232122020 is an apocalyptic number.

22232122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22232122020 is an abundant number, since it is smaller than the sum of its proper divisors (45873067860).

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

22232122020 is a wasteful number, since it uses less digits than its factorization.

22232122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223005 (or 1223000 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 22232122020 its reverse (2022123222), we get a palindrome (24254245242).

The spelling of 22232122020 in words is "twenty-two billion, two hundred thirty-two million, one hundred twenty-two thousand, twenty".