20205650189 has 2 divisors, whose sum is σ = 20205650190. Its totient is φ = 20205650188.

The previous prime is 20205650159. The next prime is 20205650221. The reversal of 20205650189 is 98105650202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13568289289 + 6637360900 = 116483^2 + 81470^2 .

It is a cyclic number.

It is not a de Polignac number, because 20205650189 - 2²⁴ = 20188872973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20205650159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102825094 + 10102825095.

It is an arithmetic number, because the mean of its divisors is an integer number (10102825095).

Almost surely, 2^20205650189 is an apocalyptic number.

It is an amenable number.

20205650189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20205650189 is an equidigital number, since it uses as much as digits as its factorization.

20205650189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 20205650189 in words is "twenty billion, two hundred five million, six hundred fifty thousand, one hundred eighty-nine".