22020161620 has 12 divisors (see below), whose sum is σ = 46242339444. Its totient is φ = 8808064640.

The previous prime is 22020161609. The next prime is 22020161623. The reversal of 22020161620 is 2616102022.

It can be written as a sum of positive squares in 2 ways, for example, as 3589927056 + 18430234564 = 59916^2 + 135758^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22020161591 and 22020161600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020161623) 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, 550504021 + ... + 550504060.

It is an arithmetic number, because the mean of its divisors is an integer number (3853528287).

Almost surely, 2^22020161620 is an apocalyptic number.

22020161620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020161620 is an abundant number, since it is smaller than the sum of its proper divisors (24222177824).

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

22020161620 is a wasteful number, since it uses less digits than its factorization.

22020161620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101008090 (or 1101008088 counting only the distinct ones).

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

Adding to 22020161620 its reverse (2616102022), we get a palindrome (24636263642).

The spelling of 22020161620 in words is "twenty-two billion, twenty million, one hundred sixty-one thousand, six hundred twenty".