20144220209 has 2 divisors, whose sum is σ = 20144220210. Its totient is φ = 20144220208.

The previous prime is 20144220179. The next prime is 20144220221. The reversal of 20144220209 is 90202244102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13823175184 + 6321045025 = 117572^2 + 79505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20144220209 is a prime.

It is not a weakly prime, because it can be changed into another prime (20144220289) by changing a digit.

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 as a sum of consecutive naturals, namely, 10072110104 + 10072110105.

It is an arithmetic number, because the mean of its divisors is an integer number (10072110105).

Almost surely, 2^20144220209 is an apocalyptic number.

It is an amenable number.

20144220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144220209 is an equidigital number, since it uses as much as digits as its factorization.

20144220209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 20144220209 in words is "twenty billion, one hundred forty-four million, two hundred twenty thousand, two hundred nine".