20044663 has 4 divisors (see below), whose sum is σ = 20071368. Its totient is φ = 20017960.

The previous prime is 20044657. The next prime is 20044667. The reversal of 20044663 is 36644002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20044663 - 2⁹ = 20044151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12193 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (5017842).

Almost surely, 2^20044663 is an apocalyptic number.

20044663 is a deficient number, since it is larger than the sum of its proper divisors (26705).

20044663 is an equidigital number, since it uses as much as digits as its factorization.

20044663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26704.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20044663 is about 4477.1266455172. The cubic root of 20044663 is about 271.6436681615.

Adding to 20044663 its reverse (36644002), we get a palindrome (56688665).

The spelling of 20044663 in words is "twenty million, forty-four thousand, six hundred sixty-three".