20052191 has 6 divisors (see below), whose sum is σ = 20201040. Its totient is φ = 19904396.

The previous prime is 20052181. The next prime is 20052209. The reversal of 20052191 is 19125002.

It is a de Polignac number, because none of the positive numbers 2^k-20052191 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 (20052101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27530 + ... + 28248.

It is an arithmetic number, because the mean of its divisors is an integer number (3366840).

Almost surely, 2^20052191 is an apocalyptic number.

20052191 is a deficient number, since it is larger than the sum of its proper divisors (148849).

20052191 is an frugal number, since it uses more digits than its factorization.

20052191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 20052191 is about 4477.9672843825. The cubic root of 20052191 is about 271.6776701897.

Adding to 20052191 its reverse (19125002), we get a palindrome (39177193).

The spelling of 20052191 in words is "twenty million, fifty-two thousand, one hundred ninety-one".