16995973693 has 2 divisors, whose sum is σ = 16995973694. Its totient is φ = 16995973692.

The previous prime is 16995973679. The next prime is 16995973751. The reversal of 16995973693 is 39637959961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14664725604 + 2331248089 = 121098^2 + 48283^2 .

It is a cyclic number.

It is not a de Polignac number, because 16995973693 - 2¹⁷ = 16995842621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16995973493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8497986846 + 8497986847.

It is an arithmetic number, because the mean of its divisors is an integer number (8497986847).

Almost surely, 2^16995973693 is an apocalyptic number.

It is an amenable number.

16995973693 is a deficient number, since it is larger than the sum of its proper divisors (1).

16995973693 is an equidigital number, since it uses as much as digits as its factorization.

16995973693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74401740, while the sum is 67.

The spelling of 16995973693 in words is "sixteen billion, nine hundred ninety-five million, nine hundred seventy-three thousand, six hundred ninety-three".