20029 has 2 divisors, whose sum is σ = 20030. Its totient is φ = 20028.

The previous prime is 20023. The next prime is 20047. The reversal of 20029 is 92002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15129 + 4900 = 123^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 20029 - 2³ = 20021 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014 + 10015.

It is an arithmetic number, because the mean of its divisors is an integer number (10015).

2²⁰⁰²⁹ is an apocalyptic number.

It is an amenable number.

20029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029 is an equidigital number, since it uses as much as digits as its factorization.

20029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20029 is about 141.5238495802. The cubic root of 20029 is about 27.1572895150.

The spelling of 20029 in words is "twenty thousand, twenty-nine".