20169323 has 2 divisors, whose sum is σ = 20169324. Its totient is φ = 20169322.

The previous prime is 20169311. The next prime is 20169349. The reversal of 20169323 is 32396102.

It is an a-pointer prime, because the next prime (20169349) can be obtained adding 20169323 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20169323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20169292 and 20169301.

It is not a weakly prime, because it can be changed into another prime (20169353) 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, 10084661 + 10084662.

It is an arithmetic number, because the mean of its divisors is an integer number (10084662).

Almost surely, 2^20169323 is an apocalyptic number.

20169323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20169323 is an equidigital number, since it uses as much as digits as its factorization.

20169323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20169323 is about 4491.0269426936. The cubic root of 20169323 is about 272.2056322406.

The spelling of 20169323 in words is "twenty million, one hundred sixty-nine thousand, three hundred twenty-three".