18932397173 has 8 divisors (see below), whose sum is σ = 19334184408. Its totient is φ = 18532260864.

The previous prime is 18932397139. The next prime is 18932397179. The reversal of 18932397173 is 37179323981.

It can be written as a sum of positive squares in 4 ways, for example, as 84676804 + 18847720369 = 9202^2 + 137287^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18932397173 - 2¹⁰ = 18932396149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18932397179) 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, 389540 + ... + 435437.

It is an arithmetic number, because the mean of its divisors is an integer number (2416773051).

Almost surely, 2^18932397173 is an apocalyptic number.

It is an amenable number.

18932397173 is a deficient number, since it is larger than the sum of its proper divisors (401787235).

18932397173 is an equidigital number, since it uses as much as digits as its factorization.

18932397173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825463.

The product of its digits is 1714608, while the sum is 53.

The spelling of 18932397173 in words is "eighteen billion, nine hundred thirty-two million, three hundred ninety-seven thousand, one hundred seventy-three".