20000022221609 has 2 divisors, whose sum is σ = 20000022221610. Its totient is φ = 20000022221608.

The previous prime is 20000022221561. The next prime is 20000022221623. The reversal of 20000022221609 is 90612222000002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15405601450009 + 4594420771600 = 3924997^2 + 2143460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000022221609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000022221659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000011110804 + 10000011110805.

It is an arithmetic number, because the mean of its divisors is an integer number (10000011110805).

Almost surely, 2^{20000022221609} is an apocalyptic number.

It is an amenable number.

20000022221609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000022221609 is an equidigital number, since it uses as much as digits as its factorization.

20000022221609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 20000022221609 in words is "twenty trillion, twenty-two million, two hundred twenty-one thousand, six hundred nine".