20471245054561 has 8 divisors (see below), whose sum is σ = 24412913357184. Its totient is φ = 16783877932800.

The previous prime is 20471245054511. The next prime is 20471245054609. The reversal of 20471245054561 is 16545054217402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20471245054561 - 2¹¹ = 20471245052513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20471245054511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63575295040 + ... + 63575295361.

It is an arithmetic number, because the mean of its divisors is an integer number (3051614169648).

Almost surely, 2^{20471245054561} is an apocalyptic number.

It is an amenable number.

20471245054561 is a deficient number, since it is larger than the sum of its proper divisors (3941668302623).

20471245054561 is a wasteful number, since it uses less digits than its factorization.

20471245054561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127150590431.

The product of its (nonzero) digits is 1344000, while the sum is 46.

The spelling of 20471245054561 in words is "twenty trillion, four hundred seventy-one billion, two hundred forty-five million, fifty-four thousand, five hundred sixty-one".