20032191 has 14 divisors (see below), whose sum is σ = 30035640. Its totient is φ = 13354308.

The previous prime is 20032163. The next prime is 20032193. The reversal of 20032191 is 19123002.

It is a happy number.

It is not a de Polignac number, because 20032191 - 2¹⁵ = 19999423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032193) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 13011 + ... + 14468.

Almost surely, 2^20032191 is an apocalyptic number.

20032191 is a deficient number, since it is larger than the sum of its proper divisors (10003449).

20032191 is an frugal number, since it uses more digits than its factorization.

20032191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27497 (or 27482 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20032191 is about 4475.7335711590. The cubic root of 20032191 is about 271.5873166239.

Adding to 20032191 its reverse (19123002), we get a palindrome (39155193).

The spelling of 20032191 in words is "twenty million, thirty-two thousand, one hundred ninety-one".