20450420432089 has 2 divisors, whose sum is σ = 20450420432090. Its totient is φ = 20450420432088.

The previous prime is 20450420432087. The next prime is 20450420432149. The reversal of 20450420432089 is 98023402405402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12623155256464 + 7827265175625 = 3552908^2 + 2797725^2 .

It is a cyclic number.

It is not a de Polignac number, because 20450420432089 - 2¹ = 20450420432087 is a prime.

Together with 20450420432087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20450420432083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225210216044 + 10225210216045.

It is an arithmetic number, because the mean of its divisors is an integer number (10225210216045).

Almost surely, 2^{20450420432089} is an apocalyptic number.

It is an amenable number.

20450420432089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20450420432089 is an equidigital number, since it uses as much as digits as its factorization.

20450420432089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 20450420432089 in words is "twenty trillion, four hundred fifty billion, four hundred twenty million, four hundred thirty-two thousand, eighty-nine".