20229089 has 2 divisors, whose sum is σ = 20229090. Its totient is φ = 20229088.

The previous prime is 20229071. The next prime is 20229101. The reversal of 20229089 is 98092202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19651489 + 577600 = 4433^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 20229089 - 2²⁴ = 3451873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1284197 and since 20229089 and 1284197 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20229289) 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, 10114544 + 10114545.

It is an arithmetic number, because the mean of its divisors is an integer number (10114545).

Almost surely, 2^20229089 is an apocalyptic number.

It is an amenable number.

20229089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20229089 is an equidigital number, since it uses as much as digits as its factorization.

20229089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20229089 is about 4497.6759554241. The cubic root of 20229089 is about 272.4742348616.

It can be divided in two parts, 2022 and 9089, that added together give a palindrome (11111).

The spelling of 20229089 in words is "twenty million, two hundred twenty-nine thousand, eighty-nine".