20869230329 has 2 divisors, whose sum is σ = 20869230330. Its totient is φ = 20869230328.

The previous prime is 20869230301. The next prime is 20869230331. The reversal of 20869230329 is 92303296802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18041862400 + 2827367929 = 134320^2 + 53173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20869230329 is a prime.

Together with 20869230331, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20869230329.

It is not a weakly prime, because it can be changed into another prime (20869239329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434615164 + 10434615165.

It is an arithmetic number, because the mean of its divisors is an integer number (10434615165).

Almost surely, 2^20869230329 is an apocalyptic number.

It is an amenable number.

20869230329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20869230329 is an equidigital number, since it uses as much as digits as its factorization.

20869230329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 20869230329 in words is "twenty billion, eight hundred sixty-nine million, two hundred thirty thousand, three hundred twenty-nine".