20544884950465 has 32 divisors (see below), whose sum is σ = 27497086848000. Its totient is φ = 14644741459968.

The previous prime is 20544884950459. The next prime is 20544884950477. The reversal of 20544884950465 is 56405948844502.

It is a cyclic number.

It is not a de Polignac number, because 20544884950465 - 2¹⁹ = 20544884426177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20544884950397 and 20544884950406.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 2096200 + ... + 6744169.

It is an arithmetic number, because the mean of its divisors is an integer number (859283964000).

Almost surely, 2^{20544884950465} is an apocalyptic number.

It is an amenable number.

20544884950465 is a deficient number, since it is larger than the sum of its proper divisors (6952201897535).

20544884950465 is a wasteful number, since it uses less digits than its factorization.

20544884950465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8841849.

The product of its (nonzero) digits is 221184000, while the sum is 64.

The spelling of 20544884950465 in words is "twenty trillion, five hundred forty-four billion, eight hundred eighty-four million, nine hundred fifty thousand, four hundred sixty-five".