20113189 has 2 divisors, whose sum is σ = 20113190. Its totient is φ = 20113188.

The previous prime is 20113187. The next prime is 20113213. The reversal of 20113189 is 98131102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19210689 + 902500 = 4383^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113189 - 2¹ = 20113187 is a prime.

Together with 20113187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056594 + 10056595.

It is an arithmetic number, because the mean of its divisors is an integer number (10056595).

Almost surely, 2^20113189 is an apocalyptic number.

It is an amenable number.

20113189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113189 is an equidigital number, since it uses as much as digits as its factorization.

20113189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 20113189 is about 4484.7730154379. The cubic root of 20113189 is about 271.9528690325.

It can be divided in two parts, 20113 and 189, that added together give a palindrome (20302).

The spelling of 20113189 in words is "twenty million, one hundred thirteen thousand, one hundred eighty-nine".