17969802113 has 4 divisors (see below), whose sum is σ = 18039723780. Its totient is φ = 17899880448.

The previous prime is 17969802079. The next prime is 17969802131. The reversal of 17969802113 is 31120896971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31120896971 = 23 ⋅1353082477.

It can be written as a sum of positive squares in 2 ways, for example, as 10972981504 + 6996820609 = 104752^2 + 83647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17969802113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17969802413) 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, 34960448 + ... + 34960961.

It is an arithmetic number, because the mean of its divisors is an integer number (4509930945).

Almost surely, 2^17969802113 is an apocalyptic number.

It is an amenable number.

17969802113 is a deficient number, since it is larger than the sum of its proper divisors (69921667).

17969802113 is an equidigital number, since it uses as much as digits as its factorization.

17969802113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69921666.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 17969802113 in words is "seventeen billion, nine hundred sixty-nine million, eight hundred two thousand, one hundred thirteen".