20173393 has 4 divisors (see below), whose sum is σ = 20358580. Its totient is φ = 19988208.

The previous prime is 20173379. The next prime is 20173397. The reversal of 20173393 is 39337102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 11716929 = 2908^2 + 3423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20173393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20173397) 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, 92430 + ... + 92647.

It is an arithmetic number, because the mean of its divisors is an integer number (5089645).

Almost surely, 2^20173393 is an apocalyptic number.

It is an amenable number.

20173393 is a deficient number, since it is larger than the sum of its proper divisors (185187).

20173393 is a wasteful number, since it uses less digits than its factorization.

20173393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185186.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 20173393 is about 4491.4800455974. The cubic root of 20173393 is about 272.2239406127.

The spelling of 20173393 in words is "twenty million, one hundred seventy-three thousand, three hundred ninety-three".