20444871 has 4 divisors (see below), whose sum is σ = 27259832. Its totient is φ = 13629912.

The previous prime is 20444869. The next prime is 20444873. The reversal of 20444871 is 17844402.

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

It is an interprime number because it is at equal distance from previous prime (20444869) and next prime (20444873).

It is not a de Polignac number, because 20444871 - 2¹ = 20444869 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 (20444873) 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 3 ways as a sum of consecutive naturals, for example, 3407476 + ... + 3407481.

It is an arithmetic number, because the mean of its divisors is an integer number (6814958).

Almost surely, 2^20444871 is an apocalyptic number.

20444871 is a deficient number, since it is larger than the sum of its proper divisors (6814961).

20444871 is an equidigital number, since it uses as much as digits as its factorization.

20444871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814960.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 20444871 is about 4521.6004909766. The cubic root of 20444871 is about 273.4396303137.

The spelling of 20444871 in words is "twenty million, four hundred forty-four thousand, eight hundred seventy-one".