22020 has 24 divisors (see below), whose sum is σ = 61824. Its totient is φ = 5856.

The previous prime is 22013. The next prime is 22027. The reversal of 22020 is 2022.

It is an interprime number because it is at equal distance from previous prime (22013) and next prime (22027).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (22027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (2576).

2²²⁰²⁰ is an apocalyptic number.

22020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020 is an abundant number, since it is smaller than the sum of its proper divisors (39804).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30912).

22020 is a wasteful number, since it uses less digits than its factorization.

22020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 22020 is about 148.3913744124. The cubic root of 22020 is about 28.0288817631.

Adding to 22020 its reverse (2022), we get a palindrome (24042).

The spelling of 22020 in words is "twenty-two thousand, twenty", and thus it is an iban number.