20044720 has 40 divisors (see below), whose sum is σ = 47273760. Its totient is φ = 7902720.

The previous prime is 20044699. The next prime is 20044721. The reversal of 20044720 is 2744002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3916 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (1181844).

Almost surely, 2^20044720 is an apocalyptic number.

20044720 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 20044720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23636880).

20044720 is an abundant number, since it is smaller than the sum of its proper divisors (27229040).

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

20044720 is a wasteful number, since it uses less digits than its factorization.

20044720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613 (or 3607 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20044720 is about 4477.1330112026. The cubic root of 20044720 is about 271.6439256477.

Adding to 20044720 its reverse (2744002), we get a palindrome (22788722).

It can be divided in two parts, 2004 and 4720, that added together give a square (6724 = 82²).

The spelling of 20044720 in words is "twenty million, forty-four thousand, seven hundred twenty".