20377126272791 has 4 divisors (see below), whose sum is σ = 21034452926784. Its totient is φ = 19719799618800.

The previous prime is 20377126272749. The next prime is 20377126272847. The reversal of 20377126272791 is 19727262177302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20377126272791 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 (20377126272731) 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, 328663326950 + ... + 328663327011.

It is an arithmetic number, because the mean of its divisors is an integer number (5258613231696).

Almost surely, 2^{20377126272791} is an apocalyptic number.

20377126272791 is a deficient number, since it is larger than the sum of its proper divisors (657326653993).

20377126272791 is an equidigital number, since it uses as much as digits as its factorization.

20377126272791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657326653992.

The product of its (nonzero) digits is 6223392, while the sum is 56.

The spelling of 20377126272791 in words is "twenty trillion, three hundred seventy-seven billion, one hundred twenty-six million, two hundred seventy-two thousand, seven hundred ninety-one".