20415505066443 has 12 divisors (see below), whose sum is σ = 29495309294568. Its totient is φ = 13607453747520.

The previous prime is 20415505066351. The next prime is 20415505066447. The reversal of 20415505066443 is 34466050551402.

20415505066443 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 550 + 50 + 6 + 6 + 4 + 43 = 666.

It is not a de Polignac number, because 20415505066443 - 2¹⁶ = 20415505000907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20415505066447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240202105 + ... + 240287082.

It is an arithmetic number, because the mean of its divisors is an integer number (2457942441214).

Almost surely, 2^{20415505066443} is an apocalyptic number.

20415505066443 is a deficient number, since it is larger than the sum of its proper divisors (9079804228125).

20415505066443 is a wasteful number, since it uses less digits than its factorization.

20415505066443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480493914 (or 480493911 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 20415505066443 in words is "twenty trillion, four hundred fifteen billion, five hundred five million, sixty-six thousand, four hundred forty-three".