20636159 has 2 divisors, whose sum is σ = 20636160. Its totient is φ = 20636158.

The previous prime is 20636141. The next prime is 20636183. The reversal of 20636159 is 95163602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20636159 - 2⁸ = 20635903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20636059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10318079 + 10318080.

It is an arithmetic number, because the mean of its divisors is an integer number (10318080).

Almost surely, 2^20636159 is an apocalyptic number.

20636159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20636159 is an equidigital number, since it uses as much as digits as its factorization.

20636159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20636159 is about 4542.7039304802. The cubic root of 20636159 is about 274.2897772551.

The spelling of 20636159 in words is "twenty million, six hundred thirty-six thousand, one hundred fifty-nine".