20444717109 has 4 divisors (see below), whose sum is σ = 27259622816. Its totient is φ = 13629811404.

The previous prime is 20444717101. The next prime is 20444717141. The reversal of 20444717109 is 90171744402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20444717109 - 2³ = 20444717101 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 (20444717101) 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, 3407452849 + ... + 3407452854.

It is an arithmetic number, because the mean of its divisors is an integer number (6814905704).

Almost surely, 2^20444717109 is an apocalyptic number.

It is an amenable number.

20444717109 is a deficient number, since it is larger than the sum of its proper divisors (6814905707).

20444717109 is an equidigital number, since it uses as much as digits as its factorization.

20444717109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814905706.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 20444717109 in words is "twenty billion, four hundred forty-four million, seven hundred seventeen thousand, one hundred nine".