16839820213291 has 2 divisors, whose sum is σ = 16839820213292. Its totient is φ = 16839820213290.

The previous prime is 16839820213219. The next prime is 16839820213343. The reversal of 16839820213291 is 19231202893861.

Together with previous prime (16839820213219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16839820213291 - 2¹⁵ = 16839820180523 is a prime.

It is not a weakly prime, because it can be changed into another prime (16839820213201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8419910106645 + 8419910106646.

It is an arithmetic number, because the mean of its divisors is an integer number (8419910106646).

Almost surely, 2^{16839820213291} is an apocalyptic number.

16839820213291 is a deficient number, since it is larger than the sum of its proper divisors (1).

16839820213291 is an equidigital number, since it uses as much as digits as its factorization.

16839820213291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 16839820213291 in words is "sixteen trillion, eight hundred thirty-nine billion, eight hundred twenty million, two hundred thirteen thousand, two hundred ninety-one".