20444663 has 8 divisors (see below), whose sum is σ = 20851200. Its totient is φ = 20041560.

The previous prime is 20444639. The next prime is 20444689. The reversal of 20444663 is 36644402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20444663 - 2²⁰ = 19396087 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 (20444063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13406 + ... + 14852.

It is an arithmetic number, because the mean of its divisors is an integer number (2606400).

Almost surely, 2^20444663 is an apocalyptic number.

20444663 is a deficient number, since it is larger than the sum of its proper divisors (406537).

20444663 is a wasteful number, since it uses less digits than its factorization.

20444663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 20444663 is about 4521.5774902129. The cubic root of 20444663 is about 273.4387030129.

The spelling of 20444663 in words is "twenty million, four hundred forty-four thousand, six hundred sixty-three".