20260189 has 2 divisors, whose sum is σ = 20260190. Its totient is φ = 20260188.

The previous prime is 20260169. The next prime is 20260193. The reversal of 20260189 is 98106202.

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., 13264164 + 6996025 = 3642^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20260189 - 2¹⁵ = 20227421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20260159) 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, 10130094 + 10130095.

It is an arithmetic number, because the mean of its divisors is an integer number (10130095).

Almost surely, 2^20260189 is an apocalyptic number.

It is an amenable number.

20260189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20260189 is an equidigital number, since it uses as much as digits as its factorization.

20260189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20260189 is about 4501.1319687385. The cubic root of 20260189 is about 272.6137964244.

It can be divided in two parts, 20260 and 189, that added together give a square (20449 = 143²).

The spelling of 20260189 in words is "twenty million, two hundred sixty thousand, one hundred eighty-nine".