20441663 has 16 divisors (see below), whose sum is σ = 23984640. Its totient is φ = 17222400.

The previous prime is 20441651. The next prime is 20441669. The reversal of 20441663 is 36614402.

It is a cyclic number.

It is not a de Polignac number, because 20441663 - 2¹⁰ = 20440639 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 (20441669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8783 + ... + 10863.

It is an arithmetic number, because the mean of its divisors is an integer number (1499040).

Almost surely, 2^20441663 is an apocalyptic number.

20441663 is a deficient number, since it is larger than the sum of its proper divisors (3542977).

20441663 is a wasteful number, since it uses less digits than its factorization.

20441663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20441663 is about 4521.2457354141. The cubic root of 20441663 is about 273.4253277825.

The spelling of 20441663 in words is "twenty million, four hundred forty-one thousand, six hundred sixty-three".