20044220 has 48 divisors (see below), whose sum is σ = 49775040. Its totient is φ = 6633984.

The previous prime is 20044187. The next prime is 20044237. The reversal of 20044220 is 2244002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20044195 and 20044204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1036980).

Almost surely, 2^20044220 is an apocalyptic number.

20044220 is a gapful number since it is divisible by the number (20) 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 20044220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24887520).

20044220 is an abundant number, since it is smaller than the sum of its proper divisors (29730820).

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

20044220 is a wasteful number, since it uses less digits than its factorization.

20044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982 (or 4980 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20044220 is about 4477.0771715484. The cubic root of 20044220 is about 271.6416669799.

Adding to 20044220 its reverse (2244002), we get a palindrome (22288222).

The spelling of 20044220 in words is "twenty million, forty-four thousand, two hundred twenty".