20831526329 has 2 divisors, whose sum is σ = 20831526330. Its totient is φ = 20831526328.

The previous prime is 20831526323. The next prime is 20831526341. The reversal of 20831526329 is 92362513802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18790926400 + 2040599929 = 137080^2 + 45173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20831526329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20831526323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10415763164 + 10415763165.

It is an arithmetic number, because the mean of its divisors is an integer number (10415763165).

Almost surely, 2^20831526329 is an apocalyptic number.

It is an amenable number.

20831526329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20831526329 is an equidigital number, since it uses as much as digits as its factorization.

20831526329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 20831526329 in words is "twenty billion, eight hundred thirty-one million, five hundred twenty-six thousand, three hundred twenty-nine".