17864540193 has 4 divisors (see below), whose sum is σ = 23819386928. Its totient is φ = 11909693460.

The previous prime is 17864540179. The next prime is 17864540227. The reversal of 17864540193 is 39104546871.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 17864540193 - 2⁶ = 17864540129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17864540143) 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, 2977423363 + ... + 2977423368.

It is an arithmetic number, because the mean of its divisors is an integer number (5954846732).

Almost surely, 2^17864540193 is an apocalyptic number.

It is an amenable number.

17864540193 is a deficient number, since it is larger than the sum of its proper divisors (5954846735).

17864540193 is an equidigital number, since it uses as much as digits as its factorization.

17864540193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954846734.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 17864540193 in words is "seventeen billion, eight hundred sixty-four million, five hundred forty thousand, one hundred ninety-three".