20044489 has 4 divisors (see below), whose sum is σ = 20080656. Its totient is φ = 20008324.

The previous prime is 20044463. The next prime is 20044499. The reversal of 20044489 is 98444002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20044489 - 2⁷ = 20044361 is a prime.

It is a super-2 number, since 2×20044489² = 803563078542242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20044489.

It is not an unprimeable number, because it can be changed into a prime (20044459) 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 3 ways as a sum of consecutive naturals, for example, 17239 + ... + 18364.

It is an arithmetic number, because the mean of its divisors is an integer number (5020164).

Almost surely, 2^20044489 is an apocalyptic number.

It is an amenable number.

20044489 is a deficient number, since it is larger than the sum of its proper divisors (36167).

20044489 is an equidigital number, since it uses as much as digits as its factorization.

20044489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36166.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20044489 is about 4477.1072133689. The cubic root of 20044489 is about 271.6428821479.

The spelling of 20044489 in words is "twenty million, forty-four thousand, four hundred eighty-nine".