13323019991 has 2 divisors, whose sum is σ = 13323019992. Its totient is φ = 13323019990.

The previous prime is 13323019981. The next prime is 13323020093. The reversal of 13323019991 is 19991032331.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13323019991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13323019981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6661509995 + 6661509996.

It is an arithmetic number, because the mean of its divisors is an integer number (6661509996).

Almost surely, 2^13323019991 is an apocalyptic number.

13323019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13323019991 is an equidigital number, since it uses as much as digits as its factorization.

13323019991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The spelling of 13323019991 in words is "thirteen billion, three hundred twenty-three million, nineteen thousand, nine hundred ninety-one".