20606047073 has 4 divisors (see below), whose sum is σ = 20994840468. Its totient is φ = 20217253680.

The previous prime is 20606047069. The next prime is 20606047079. The reversal of 20606047073 is 37074060602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14837188864 + 5768858209 = 121808^2 + 75953^2 .

It is a cyclic number.

It is not a de Polignac number, because 20606047073 - 2² = 20606047069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20606047079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194396618 + ... + 194396723.

It is an arithmetic number, because the mean of its divisors is an integer number (5248710117).

Almost surely, 2^20606047073 is an apocalyptic number.

It is an amenable number.

20606047073 is a deficient number, since it is larger than the sum of its proper divisors (388793395).

20606047073 is an equidigital number, since it uses as much as digits as its factorization.

20606047073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388793394.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 20606047073 in words is "twenty billion, six hundred six million, forty-seven thousand, seventy-three".