20252191 has 8 divisors (see below), whose sum is σ = 20490624. Its totient is φ = 20015520.

The previous prime is 20252189. The next prime is 20252231. The reversal of 20252191 is 19125202.

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 20252191 - 2¹ = 20252189 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 (20252131) 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, 43701 + ... + 44161.

It is an arithmetic number, because the mean of its divisors is an integer number (2561328).

Almost surely, 2^20252191 is an apocalyptic number.

20252191 is a deficient number, since it is larger than the sum of its proper divisors (238433).

20252191 is a wasteful number, since it uses less digits than its factorization.

20252191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20252191 is about 4500.2434378598. The cubic root of 20252191 is about 272.5779189684.

Adding to 20252191 its reverse (19125202), we get a palindrome (39377393).

The spelling of 20252191 in words is "twenty million, two hundred fifty-two thousand, one hundred ninety-one".