20084609 has 2 divisors, whose sum is σ = 20084610. Its totient is φ = 20084608.

The previous prime is 20084591. The next prime is 20084639. The reversal of 20084609 is 90648002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 970225 = 4372^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20084609 - 2¹² = 20080513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20084639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042304 + 10042305.

It is an arithmetic number, because the mean of its divisors is an integer number (10042305).

Almost surely, 2^20084609 is an apocalyptic number.

It is an amenable number.

20084609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20084609 is an equidigital number, since it uses as much as digits as its factorization.

20084609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20084609 is about 4481.5855453176. The cubic root of 20084609 is about 271.8239967565.

The spelling of 20084609 in words is "twenty million, eighty-four thousand, six hundred nine".