20050566681599 has 4 divisors (see below), whose sum is σ = 20076505319736. Its totient is φ = 20024628043464.

The previous prime is 20050566681539. The next prime is 20050566681637. The reversal of 20050566681599 is 99518666505002.

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

It is a cyclic number.

It is not a de Polignac number, because 20050566681599 - 2⁴⁴ = 2458380637183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050566681539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12969317909 + ... + 12969319454.

It is an arithmetic number, because the mean of its divisors is an integer number (5019126329934).

Almost surely, 2^{20050566681599} is an apocalyptic number.

20050566681599 is a deficient number, since it is larger than the sum of its proper divisors (25938638137).

20050566681599 is an equidigital number, since it uses as much as digits as its factorization.

20050566681599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25938638136.

The product of its (nonzero) digits is 34992000, while the sum is 62.

The spelling of 20050566681599 in words is "twenty trillion, fifty billion, five hundred sixty-six million, six hundred eighty-one thousand, five hundred ninety-nine".