22000022020 has 12 divisors (see below), whose sum is σ = 46200046284. Its totient is φ = 8800008800.

The previous prime is 22000021973. The next prime is 22000022027. The reversal of 22000022020 is 2022000022.

It can be written as a sum of positive squares in 2 ways, for example, as 17018767936 + 4981254084 = 130456^2 + 70578^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22000021988 and 22000022006.

It is not an unprimeable number, because it can be changed into a prime (22000022027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550000531 + ... + 550000570.

It is an arithmetic number, because the mean of its divisors is an integer number (3850003857).

Almost surely, 2^22000022020 is an apocalyptic number.

22000022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000022020 is an abundant number, since it is smaller than the sum of its proper divisors (24200024264).

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

22000022020 is a wasteful number, since it uses less digits than its factorization.

22000022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100001110 (or 1100001108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 22000022020 its reverse (2022000022), we get a palindrome (24022022042).

It can be divided in two parts, 2200002 and 2020, that added together give a palindrome (2202022).

The spelling of 22000022020 in words is "twenty-two billion, twenty-two thousand, twenty".