17660842138 has 8 divisors (see below), whose sum is σ = 26492274720. Its totient is φ = 8830083900.

The previous prime is 17660842117. The next prime is 17660842193. The reversal of 17660842138 is 83124806671.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×17660842138² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97038 + ... + 211513.

It is an arithmetic number, because the mean of its divisors is an integer number (3311534340).

Almost surely, 2^17660842138 is an apocalyptic number.

17660842138 is a deficient number, since it is larger than the sum of its proper divisors (8831432582).

17660842138 is a wasteful number, since it uses less digits than its factorization.

17660842138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337172.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 17660842138 in words is "seventeen billion, six hundred sixty million, eight hundred forty-two thousand, one hundred thirty-eight".