20768095561 has 8 divisors (see below), whose sum is σ = 20793638880. Its totient is φ = 20742570912.

The previous prime is 20768095519. The next prime is 20768095567. The reversal of 20768095561 is 16559086702.

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 20768095561 - 2²⁵ = 20734541129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20768095567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4007470 + ... + 4012648.

It is an arithmetic number, because the mean of its divisors is an integer number (2599204860).

Almost surely, 2^20768095561 is an apocalyptic number.

It is an amenable number.

20768095561 is a deficient number, since it is larger than the sum of its proper divisors (25543319).

20768095561 is a wasteful number, since it uses less digits than its factorization.

20768095561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9335.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 20768095561 in words is "twenty billion, seven hundred sixty-eight million, ninety-five thousand, five hundred sixty-one".