20386169 has 2 divisors, whose sum is σ = 20386170. Its totient is φ = 20386168.

The previous prime is 20386153. The next prime is 20386207. The reversal of 20386169 is 96168302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 1026169 = 4400^2 + 1013^2 .

It is a cyclic number.

It is not a de Polignac number, because 20386169 - 2⁴ = 20386153 is a prime.

It is a super-2 number, since 2×20386169² = 831191772993122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20386969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193084 + 10193085.

It is an arithmetic number, because the mean of its divisors is an integer number (10193085).

Almost surely, 2^20386169 is an apocalyptic number.

It is an amenable number.

20386169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20386169 is an equidigital number, since it uses as much as digits as its factorization.

20386169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20386169 is about 4515.1045392106. The cubic root of 20386169 is about 273.1776764277.

The spelling of 20386169 in words is "twenty million, three hundred eighty-six thousand, one hundred sixty-nine".