20375189 has 2 divisors, whose sum is σ = 20375190. Its totient is φ = 20375188.

The previous prime is 20375183. The next prime is 20375209. The reversal of 20375189 is 98157302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17783089 + 2592100 = 4217^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20375189 - 2⁸ = 20374933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187594 + 10187595.

It is an arithmetic number, because the mean of its divisors is an integer number (10187595).

Almost surely, 2^20375189 is an apocalyptic number.

It is an amenable number.

20375189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375189 is an equidigital number, since it uses as much as digits as its factorization.

20375189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 20375189 is about 4513.8884567521. Note that the first 3 decimals coincide. The cubic root of 20375189 is about 273.1286230793.

The spelling of 20375189 in words is "twenty million, three hundred seventy-five thousand, one hundred eighty-nine".