20022 has 16 divisors (see below), whose sum is σ = 41472. Its totient is φ = 6440.

The previous prime is 20021. The next prime is 20023. The reversal of 20022 is 22002.

20022 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20021) and next prime (20023).

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

20022 is a modest number, since divided by 22 gives 2 as remainder.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021) 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, 247 + ... + 317.

It is an arithmetic number, because the mean of its divisors is an integer number (2592).

2²⁰⁰²² is an apocalyptic number.

It is a pronic number, being equal to 141×142.

20022 is an abundant number, since it is smaller than the sum of its proper divisors (21450).

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 (20736).

20022 is a wasteful number, since it uses less digits than its factorization.

20022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123.

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

The square root of 20022 is about 141.4991166050. The cubic root of 20022 is about 27.1541253834.

Adding to 20022 its reverse (22002), we get a palindrome (42024).

It can be divided in two parts, 2002 and 2, that multiplied together give a palindrome (4004).

The spelling of 20022 in words is "twenty thousand, twenty-two", and thus it is an iban number.