17670872018 has 6 divisors (see below), whose sum is σ = 26506590021. Its totient is φ = 8835342012.

The previous prime is 17670871961. The next prime is 17670872033. The reversal of 17670872018 is 81027807671.

It can be written as a sum of positive squares in 2 ways, for example, as 11004639409 + 6666232609 = 104903^2 + 81647^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=93997.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140996 + ... + 234992.

Almost surely, 2^17670872018 is an apocalyptic number.

17670872018 is a deficient number, since it is larger than the sum of its proper divisors (8835718003).

17670872018 is an frugal number, since it uses more digits than its factorization.

17670872018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187996 (or 93999 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 47.

The spelling of 17670872018 in words is "seventeen billion, six hundred seventy million, eight hundred seventy-two thousand, eighteen".