20771296946057 has 4 divisors (see below), whose sum is σ = 23738625081216. Its totient is φ = 17803968810900.

The previous prime is 20771296946047. The next prime is 20771296946063. The reversal of 20771296946057 is 75064969217702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20771296946057 - 2⁸ = 20771296945801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20771296945984 and 20771296946002.

It is not an unprimeable number, because it can be changed into a prime (20771296946047) 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, 1483664067569 + ... + 1483664067582.

It is an arithmetic number, because the mean of its divisors is an integer number (5934656270304).

Almost surely, 2^{20771296946057} is an apocalyptic number.

It is an amenable number.

20771296946057 is a deficient number, since it is larger than the sum of its proper divisors (2967328135159).

20771296946057 is an equidigital number, since it uses as much as digits as its factorization.

20771296946057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967328135158.

The product of its (nonzero) digits is 80015040, while the sum is 65.

The spelling of 20771296946057 in words is "twenty trillion, seven hundred seventy-one billion, two hundred ninety-six million, nine hundred forty-six thousand, fifty-seven".