20044020 has 96 divisors (see below), whose sum is σ = 60939648. Its totient is φ = 4902912.

The previous prime is 20044009. The next prime is 20044027. The reversal of 20044020 is 2044002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20043987 and 20044005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044027) 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 31 ways as a sum of consecutive naturals, for example, 43632 + ... + 44088.

It is an arithmetic number, because the mean of its divisors is an integer number (634788).

Almost surely, 2^20044020 is an apocalyptic number.

20044020 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 20044020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30469824).

20044020 is an abundant number, since it is smaller than the sum of its proper divisors (40895628).

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

20044020 is a wasteful number, since it uses less digits than its factorization.

20044020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20044020 is about 4477.0548354917. The cubic root of 20044020 is about 271.6407635023.

Adding to 20044020 its reverse (2044002), we get a palindrome (22088022).

The spelling of 20044020 in words is "twenty million, forty-four thousand, twenty".