20875189 has 4 divisors (see below), whose sum is σ = 20912320. Its totient is φ = 20838060.

The previous prime is 20875187. The next prime is 20875193. The reversal of 20875189 is 98157802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20875189 - 2¹ = 20875187 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 (20875181) 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, 17709 + ... + 18850.

It is an arithmetic number, because the mean of its divisors is an integer number (5228080).

Almost surely, 2^20875189 is an apocalyptic number.

It is an amenable number.

20875189 is a deficient number, since it is larger than the sum of its proper divisors (37131).

20875189 is an equidigital number, since it uses as much as digits as its factorization.

20875189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37130.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 20875189 is about 4568.9374038172. The cubic root of 20875189 is about 275.3447532949.

The spelling of 20875189 in words is "twenty million, eight hundred seventy-five thousand, one hundred eighty-nine".