20441605 has 4 divisors (see below), whose sum is σ = 24529932. Its totient is φ = 16353280.

The previous prime is 20441593. The next prime is 20441611. The reversal of 20441605 is 50614402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50614402 = 2 ⋅25307201.

It can be written as a sum of positive squares in 2 ways, for example, as 15610401 + 4831204 = 3951^2 + 2198^2 .

It is not a de Polignac number, because 20441605 - 2⁵ = 20441573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2044156 + ... + 2044165.

It is an arithmetic number, because the mean of its divisors is an integer number (6132483).

Almost surely, 2^20441605 is an apocalyptic number.

It is an amenable number.

20441605 is a deficient number, since it is larger than the sum of its proper divisors (4088327).

20441605 is an equidigital number, since it uses as much as digits as its factorization.

20441605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088326.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20441605 is about 4521.2393212481. The cubic root of 20441605 is about 273.4250691818.

The spelling of 20441605 in words is "twenty million, four hundred forty-one thousand, six hundred five".