20043220009 has 4 divisors (see below), whose sum is σ = 20079204804. Its totient is φ = 20007235216.

The previous prime is 20043219971. The next prime is 20043220019. The reversal of 20043220009 is 90002234002.

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 9912193600 + 10131026409 = 99560^2 + 100653^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043220009 - 2¹³ = 20043211817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20043220019) 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, 17991562 + ... + 17992675.

It is an arithmetic number, because the mean of its divisors is an integer number (5019801201).

Almost surely, 2^20043220009 is an apocalyptic number.

It is an amenable number.

20043220009 is a deficient number, since it is larger than the sum of its proper divisors (35984795).

20043220009 is an equidigital number, since it uses as much as digits as its factorization.

20043220009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35984794.

The product of its (nonzero) digits is 864, while the sum is 22.

The spelling of 20043220009 in words is "twenty billion, forty-three million, two hundred twenty thousand, nine".