20768161247999 has 8 divisors (see below), whose sum is σ = 22720357712592. Its totient is φ = 18826661751040.

The previous prime is 20768161247971. The next prime is 20768161248041. The reversal of 20768161247999 is 99974216186702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20768161247999 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 (20768161247959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2674237844 + ... + 2674245609.

It is an arithmetic number, because the mean of its divisors is an integer number (2840044714074).

Almost surely, 2^{20768161247999} is an apocalyptic number.

20768161247999 is a deficient number, since it is larger than the sum of its proper divisors (1952196464593).

20768161247999 is a wasteful number, since it uses less digits than its factorization.

20768161247999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348483817.

The product of its (nonzero) digits is 164602368, while the sum is 71.

The spelling of 20768161247999 in words is "twenty trillion, seven hundred sixty-eight billion, one hundred sixty-one million, two hundred forty-seven thousand, nine hundred ninety-nine".