20268312727 has 4 divisors (see below), whose sum is σ = 21827413720. Its totient is φ = 18709211736.

The previous prime is 20268312697. The next prime is 20268312749. The reversal of 20268312727 is 72721386202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72721386202 = 2 ⋅36360693101.

It is a cyclic number.

It is not a de Polignac number, because 20268312727 - 2²⁷ = 20134094999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20268312727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20268312767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779550477 + ... + 779550502.

It is an arithmetic number, because the mean of its divisors is an integer number (5456853430).

Almost surely, 2^20268312727 is an apocalyptic number.

20268312727 is a deficient number, since it is larger than the sum of its proper divisors (1559100993).

20268312727 is a wasteful number, since it uses less digits than its factorization.

20268312727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559100992.

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 20268312727 its reverse (72721386202), we get a palindrome (92989698929).

The spelling of 20268312727 in words is "twenty billion, two hundred sixty-eight million, three hundred twelve thousand, seven hundred twenty-seven".