17953121813 has 8 divisors (see below), whose sum is σ = 20737296000. Its totient is φ = 15360959680.

The previous prime is 17953121801. The next prime is 17953121827. The reversal of 17953121813 is 31812135971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17953121813 - 2³⁴ = 773252629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17953121863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48002813 + ... + 48003186.

It is an arithmetic number, because the mean of its divisors is an integer number (2592162000).

Almost surely, 2^17953121813 is an apocalyptic number.

It is an amenable number.

17953121813 is a deficient number, since it is larger than the sum of its proper divisors (2784174187).

17953121813 is a wasteful number, since it uses less digits than its factorization.

17953121813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96006027.

The product of its digits is 45360, while the sum is 41.

The spelling of 17953121813 in words is "seventeen billion, nine hundred fifty-three million, one hundred twenty-one thousand, eight hundred thirteen".