20171193 has 12 divisors (see below), whose sum is σ = 31286160. Its totient is φ = 11526312.

The previous prime is 20171191. The next prime is 20171201. The reversal of 20171193 is 39117102.

It is not a de Polignac number, because 20171193 - 2¹ = 20171191 is a prime.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20171191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68463 + ... + 68756.

It is an arithmetic number, because the mean of its divisors is an integer number (2607180).

Almost surely, 2^20171193 is an apocalyptic number.

It is an amenable number.

20171193 is a deficient number, since it is larger than the sum of its proper divisors (11114967).

20171193 is a wasteful number, since it uses less digits than its factorization.

20171193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137236 (or 137229 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 20171193 is about 4491.2351307853. The cubic root of 20171193 is about 272.2140445011.

Adding to 20171193 its reverse (39117102), we get a palindrome (59288295).

The spelling of 20171193 in words is "twenty million, one hundred seventy-one thousand, one hundred ninety-three".