20150189 has 2 divisors, whose sum is σ = 20150190. Its totient is φ = 20150188.

The previous prime is 20150177. The next prime is 20150197. The reversal of 20150189 is 98105102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20097289 + 52900 = 4483^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150189 - 2⁸ = 20149933 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075094 + 10075095.

It is an arithmetic number, because the mean of its divisors is an integer number (10075095).

Almost surely, 2^20150189 is an apocalyptic number.

It is an amenable number.

20150189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20150189 is an equidigital number, since it uses as much as digits as its factorization.

20150189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 20150189 is about 4488.8961894880. The cubic root of 20150189 is about 272.1195273765.

The spelling of 20150189 in words is "twenty million, one hundred fifty thousand, one hundred eighty-nine".