20632189 has 2 divisors, whose sum is σ = 20632190. Its totient is φ = 20632188.

The previous prime is 20632177. The next prime is 20632243. The reversal of 20632189 is 98123602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20548089 + 84100 = 4533^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20632189 - 2¹³ = 20623997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20632189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20632159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316094 + 10316095.

It is an arithmetic number, because the mean of its divisors is an integer number (10316095).

Almost surely, 2^20632189 is an apocalyptic number.

It is an amenable number.

20632189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632189 is an equidigital number, since it uses as much as digits as its factorization.

20632189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20632189 is about 4542.2669450397. The cubic root of 20632189 is about 274.2721867683.

The spelling of 20632189 in words is "twenty million, six hundred thirty-two thousand, one hundred eighty-nine".