20944327009 has 4 divisors (see below), whose sum is σ = 21160248004. Its totient is φ = 20728406016.

The previous prime is 20944327007. The next prime is 20944327031. The reversal of 20944327009 is 90072344902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9006579409 + 11937747600 = 94903^2 + 109260^2 .

It is a cyclic number.

It is not a de Polignac number, because 20944327009 - 2¹ = 20944327007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20944327007) 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, 107960352 + ... + 107960545.

It is an arithmetic number, because the mean of its divisors is an integer number (5290062001).

Almost surely, 2^20944327009 is an apocalyptic number.

It is an amenable number.

20944327009 is a deficient number, since it is larger than the sum of its proper divisors (215920995).

20944327009 is an equidigital number, since it uses as much as digits as its factorization.

20944327009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215920994.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 20944327009 in words is "twenty billion, nine hundred forty-four million, three hundred twenty-seven thousand, nine".