20166329 has 2 divisors, whose sum is σ = 20166330. Its totient is φ = 20166328.

The previous prime is 20166317. The next prime is 20166359. The reversal of 20166329 is 92366102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14807104 + 5359225 = 3848^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 20166329 - 2²⁰ = 19117753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20166359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10083164 + 10083165.

It is an arithmetic number, because the mean of its divisors is an integer number (10083165).

Almost surely, 2^20166329 is an apocalyptic number.

It is an amenable number.

20166329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20166329 is an equidigital number, since it uses as much as digits as its factorization.

20166329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20166329 is about 4490.6935989889. The cubic root of 20166329 is about 272.1921625438.

The spelling of 20166329 in words is "twenty million, one hundred sixty-six thousand, three hundred twenty-nine".