16945202017 has 4 divisors (see below), whose sum is σ = 17222992276. Its totient is φ = 16667411760.

The previous prime is 16945201993. The next prime is 16945202033. The reversal of 16945202017 is 71020254961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71020254961 = 29 ⋅2448974309.

It can be written as a sum of positive squares in 2 ways, for example, as 3721122001 + 13224080016 = 61001^2 + 114996^2 .

It is a cyclic number.

It is not a de Polignac number, because 16945202017 - 2²³ = 16936813409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16945203017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138895038 + ... + 138895159.

It is an arithmetic number, because the mean of its divisors is an integer number (4305748069).

Almost surely, 2^16945202017 is an apocalyptic number.

It is an amenable number.

16945202017 is a deficient number, since it is larger than the sum of its proper divisors (277790259).

16945202017 is an equidigital number, since it uses as much as digits as its factorization.

16945202017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277790258.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 16945202017 its reverse (71020254961), we get a palindrome (87965456978).

The spelling of 16945202017 in words is "sixteen billion, nine hundred forty-five million, two hundred two thousand, seventeen".