17671948971 has 4 divisors (see below), whose sum is σ = 23562598632. Its totient is φ = 11781299312.

The previous prime is 17671948969. The next prime is 17671949041. The reversal of 17671948971 is 17984917671.

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 17671948971 - 2¹ = 17671948969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17671948471) 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, 2945324826 + ... + 2945324831.

It is an arithmetic number, because the mean of its divisors is an integer number (5890649658).

Almost surely, 2^17671948971 is an apocalyptic number.

17671948971 is a deficient number, since it is larger than the sum of its proper divisors (5890649661).

17671948971 is an equidigital number, since it uses as much as digits as its factorization.

17671948971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890649660.

The product of its digits is 5334336, while the sum is 60.

The spelling of 17671948971 in words is "seventeen billion, six hundred seventy-one million, nine hundred forty-eight thousand, nine hundred seventy-one".