22020144 has 40 divisors (see below), whose sum is σ = 57615360. Its totient is φ = 7245888.

The previous prime is 22020133. The next prime is 22020161. The reversal of 22020144 is 44102022.

It is an unprimeable number.

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, 889 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (1440384).

Almost surely, 2^22020144 is an apocalyptic number.

22020144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22020144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28807680).

22020144 is an abundant number, since it is smaller than the sum of its proper divisors (35595216).

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

22020144 is a wasteful number, since it uses less digits than its factorization.

22020144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5891 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22020144 is about 4692.5626261138. The cubic root of 22020144 is about 280.2894286134.

Adding to 22020144 its reverse (44102022), we get a palindrome (66122166).

The spelling of 22020144 in words is "twenty-two million, twenty thousand, one hundred forty-four".