16993313321 has 2 divisors, whose sum is σ = 16993313322. Its totient is φ = 16993313320.

The previous prime is 16993313303. The next prime is 16993313333. The reversal of 16993313321 is 12331339961.

16993313321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15236446096 + 1756867225 = 123436^2 + 41915^2 .

It is a cyclic number.

It is not a de Polignac number, because 16993313321 - 2⁶ = 16993313257 is a prime.

It is not a weakly prime, because it can be changed into another prime (16993313371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8496656660 + 8496656661.

It is an arithmetic number, because the mean of its divisors is an integer number (8496656661).

Almost surely, 2^16993313321 is an apocalyptic number.

It is an amenable number.

16993313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16993313321 is an equidigital number, since it uses as much as digits as its factorization.

16993313321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 41.

The spelling of 16993313321 in words is "sixteen billion, nine hundred ninety-three million, three hundred thirteen thousand, three hundred twenty-one".