17947668907 has 32 divisors (see below), whose sum is σ = 22183096320. Its totient is φ = 14177268000.

The previous prime is 17947668901. The next prime is 17947669001. The reversal of 17947668907 is 70986674971.

It is a de Polignac number, because none of the positive numbers 2^k-17947668907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17947668901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1429218 + ... + 1441720.

It is an arithmetic number, because the mean of its divisors is an integer number (693221760).

Almost surely, 2^17947668907 is an apocalyptic number.

17947668907 is a deficient number, since it is larger than the sum of its proper divisors (4235427413).

17947668907 is a wasteful number, since it uses less digits than its factorization.

17947668907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12823.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The spelling of 17947668907 in words is "seventeen billion, nine hundred forty-seven million, six hundred sixty-eight thousand, nine hundred seven".