20630089 has 2 divisors, whose sum is σ = 20630090. Its totient is φ = 20630088.

The previous prime is 20630087. The next prime is 20630119. The reversal of 20630089 is 98003602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 308025 = 4508^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20630089 - 2¹ = 20630087 is a prime.

Together with 20630087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20630083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315044 + 10315045.

It is an arithmetic number, because the mean of its divisors is an integer number (10315045).

Almost surely, 2^20630089 is an apocalyptic number.

It is an amenable number.

20630089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630089 is an equidigital number, since it uses as much as digits as its factorization.

20630089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20630089 is about 4542.0357770498. The cubic root of 20630089 is about 274.2628810642.

The spelling of 20630089 in words is "twenty million, six hundred thirty thousand, eighty-nine".