20129339 has 2 divisors, whose sum is σ = 20129340. Its totient is φ = 20129338.

The previous prime is 20129327. The next prime is 20129353. The reversal of 20129339 is 93392102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20129339 - 2¹² = 20125243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20129399) 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, 10064669 + 10064670.

It is an arithmetic number, because the mean of its divisors is an integer number (10064670).

Almost surely, 2^20129339 is an apocalyptic number.

20129339 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129339 is an equidigital number, since it uses as much as digits as its factorization.

20129339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20129339 is about 4486.5731912006. The cubic root of 20129339 is about 272.0256382624.

The spelling of 20129339 in words is "twenty million, one hundred twenty-nine thousand, three hundred thirty-nine".