17975396867 has 4 divisors (see below), whose sum is σ = 17975822040. Its totient is φ = 17974971696.

The previous prime is 17975396863. The next prime is 17975396893. The reversal of 17975396867 is 76869357971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17975396867 - 2² = 17975396863 is a prime.

It is a super-2 number, since 2×17975396867² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17975396797 and 17975396806.

It is not an unprimeable number, because it can be changed into a prime (17975396863) 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, 141173 + ... + 236390.

It is an arithmetic number, because the mean of its divisors is an integer number (4493955510).

Almost surely, 2^17975396867 is an apocalyptic number.

17975396867 is a deficient number, since it is larger than the sum of its proper divisors (425173).

17975396867 is an equidigital number, since it uses as much as digits as its factorization.

17975396867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425172.

The product of its digits is 120022560, while the sum is 68.

The spelling of 17975396867 in words is "seventeen billion, nine hundred seventy-five million, three hundred ninety-six thousand, eight hundred sixty-seven".