20044320 has 48 divisors (see below), whose sum is σ = 63141120. Its totient is φ = 5345024.

The previous prime is 20044319. The next prime is 20044351. The reversal of 20044320 is 2344002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20044320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20400 + ... + 21359.

It is an arithmetic number, because the mean of its divisors is an integer number (1315440).

Almost surely, 2^20044320 is an apocalyptic number.

20044320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20044320 is an abundant number, since it is smaller than the sum of its proper divisors (43096800).

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

20044320 is a wasteful number, since it uses less digits than its factorization.

20044320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41777 (or 41769 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20044320 is about 4477.0883395350. The cubic root of 20044320 is about 271.6421187165.

Adding to 20044320 its reverse (2344002), we get a palindrome (22388322).

The spelling of 20044320 in words is "twenty million, forty-four thousand, three hundred twenty".