20130031320991 has 2 divisors, whose sum is σ = 20130031320992. Its totient is φ = 20130031320990.

The previous prime is 20130031320989. The next prime is 20130031321019. The reversal of 20130031320991 is 19902313003102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20130031320991 - 2¹ = 20130031320989 is a prime.

Together with 20130031320989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20130038320991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065015660495 + 10065015660496.

It is an arithmetic number, because the mean of its divisors is an integer number (10065015660496).

Almost surely, 2^{20130031320991} is an apocalyptic number.

20130031320991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130031320991 is an equidigital number, since it uses as much as digits as its factorization.

20130031320991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The spelling of 20130031320991 in words is "twenty trillion, one hundred thirty billion, thirty-one million, three hundred twenty thousand, nine hundred ninety-one".