20330129 has 2 divisors, whose sum is σ = 20330130. Its totient is φ = 20330128.

The previous prime is 20330119. The next prime is 20330143. The reversal of 20330129 is 92103302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 2496400 = 4223^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330129 - 2¹⁶ = 20264593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20330129.

It is not a weakly prime, because it can be changed into another prime (20330119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165064 + 10165065.

It is an arithmetic number, because the mean of its divisors is an integer number (10165065).

Almost surely, 2^20330129 is an apocalyptic number.

It is an amenable number.

20330129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330129 is an equidigital number, since it uses as much as digits as its factorization.

20330129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20330129 is about 4508.8944321197. The cubic root of 20330129 is about 272.9271319518.

The spelling of 20330129 in words is "twenty million, three hundred thirty thousand, one hundred twenty-nine".