20771296945801 has 2 divisors, whose sum is σ = 20771296945802. Its totient is φ = 20771296945800.

The previous prime is 20771296945793. The next prime is 20771296945811. The reversal of 20771296945801 is 10854969217702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14051822027776 + 6719474918025 = 3748576^2 + 2592195^2 .

It is a cyclic number.

It is not a de Polignac number, because 20771296945801 - 2³ = 20771296945793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20771296945801.

It is not a weakly prime, because it can be changed into another prime (20771296945811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10385648472900 + 10385648472901.

It is an arithmetic number, because the mean of its divisors is an integer number (10385648472901).

Almost surely, 2^{20771296945801} is an apocalyptic number.

It is an amenable number.

20771296945801 is a deficient number, since it is larger than the sum of its proper divisors (1).

20771296945801 is an equidigital number, since it uses as much as digits as its factorization.

20771296945801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 20771296945801 in words is "twenty trillion, seven hundred seventy-one billion, two hundred ninety-six million, nine hundred forty-five thousand, eight hundred one".