17220686117 has 2 divisors, whose sum is σ = 17220686118. Its totient is φ = 17220686116.

The previous prime is 17220686111. The next prime is 17220686167. The reversal of 17220686117 is 71168602271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14132216641 + 3088469476 = 118879^2 + 55574^2 .

It is a cyclic number.

It is not a de Polignac number, because 17220686117 - 2⁴ = 17220686101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17220686111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8610343058 + 8610343059.

It is an arithmetic number, because the mean of its divisors is an integer number (8610343059).

Almost surely, 2^17220686117 is an apocalyptic number.

It is an amenable number.

17220686117 is a deficient number, since it is larger than the sum of its proper divisors (1).

17220686117 is an equidigital number, since it uses as much as digits as its factorization.

17220686117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 17220686117 in words is "seventeen billion, two hundred twenty million, six hundred eighty-six thousand, one hundred seventeen".