16992019817 has 2 divisors, whose sum is σ = 16992019818. Its totient is φ = 16992019816.

The previous prime is 16992019783. The next prime is 16992019829. The reversal of 16992019817 is 71891029961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13219480576 + 3772539241 = 114976^2 + 61421^2 .

It is a cyclic number.

It is not a de Polignac number, because 16992019817 - 2⁶ = 16992019753 is a prime.

It is a super-2 number, since 2×16992019817² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16994019817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8496009908 + 8496009909.

It is an arithmetic number, because the mean of its divisors is an integer number (8496009909).

Almost surely, 2^16992019817 is an apocalyptic number.

It is an amenable number.

16992019817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16992019817 is an equidigital number, since it uses as much as digits as its factorization.

16992019817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 16992019817 in words is "sixteen billion, nine hundred ninety-two million, nineteen thousand, eight hundred seventeen".