17975320172 has 6 divisors (see below), whose sum is σ = 31456810308. Its totient is φ = 8987660084.

The previous prime is 17975320171. The next prime is 17975320189. The reversal of 17975320172 is 27102357971.

It is a super-2 number, since 2×17975320172² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17975320171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2246915018 + ... + 2246915025.

It is an arithmetic number, because the mean of its divisors is an integer number (5242801718).

Almost surely, 2^17975320172 is an apocalyptic number.

It is an amenable number.

17975320172 is a deficient number, since it is larger than the sum of its proper divisors (13481490136).

17975320172 is a wasteful number, since it uses less digits than its factorization.

17975320172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493830047 (or 4493830045 counting only the distinct ones).

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 17975320172 in words is "seventeen billion, nine hundred seventy-five million, three hundred twenty thousand, one hundred seventy-two".