20865433585667 has 16 divisors (see below), whose sum is σ = 23083250918400. Its totient is φ = 18701117971200.

The previous prime is 20865433585663. The next prime is 20865433585669. The reversal of 20865433585667 is 76658533456802.

It is a cyclic number.

It is not a de Polignac number, because 20865433585667 - 2² = 20865433585663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20865433585597 and 20865433585606.

It is not an unprimeable number, because it can be changed into a prime (20865433585663) 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 15 ways as a sum of consecutive naturals, for example, 60545459 + ... + 60889107.

It is an arithmetic number, because the mean of its divisors is an integer number (1442703182400).

Almost surely, 2^{20865433585667} is an apocalyptic number.

20865433585667 is a deficient number, since it is larger than the sum of its proper divisors (2217817332733).

20865433585667 is a wasteful number, since it uses less digits than its factorization.

20865433585667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421474.

The product of its (nonzero) digits is 870912000, while the sum is 68.

The spelling of 20865433585667 in words is "twenty trillion, eight hundred sixty-five billion, four hundred thirty-three million, five hundred eighty-five thousand, six hundred sixty-seven".