20443122 has 48 divisors (see below), whose sum is σ = 51217920. Its totient is φ = 5772096.

The previous prime is 20443109. The next prime is 20443123. The reversal of 20443122 is 22134402.

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 = 20443095 and 20443104.

It is not an unprimeable number, because it can be changed into a prime (20443123) 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, 10303 + ... + 12125.

It is an arithmetic number, because the mean of its divisors is an integer number (1067040).

Almost surely, 2^20443122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20443122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25608960).

20443122 is an abundant number, since it is smaller than the sum of its proper divisors (30774798).

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

20443122 is a wasteful number, since it uses less digits than its factorization.

20443122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1924 counting only the distinct ones).

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

The square root of 20443122 is about 4521.4070818717. The cubic root of 20443122 is about 273.4318327664.

Adding to 20443122 its reverse (22134402), we get a palindrome (42577524).

The spelling of 20443122 in words is "twenty million, four hundred forty-three thousand, one hundred twenty-two".