26927781923 has 4 divisors (see below), whose sum is σ = 30774607920. Its totient is φ = 23080955928.

The previous prime is 26927781889. The next prime is 26927781971. The reversal of 26927781923 is 32918772962.

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

It is a cyclic number.

It is not a de Polignac number, because 26927781923 - 2²⁴ = 26911004707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26927781983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923412988 + ... + 1923413001.

It is an arithmetic number, because the mean of its divisors is an integer number (7693651980).

Almost surely, 2^26927781923 is an apocalyptic number.

26927781923 is a deficient number, since it is larger than the sum of its proper divisors (3846825997).

26927781923 is an equidigital number, since it uses as much as digits as its factorization.

26927781923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846825996.

The product of its digits is 4572288, while the sum is 56.

The spelling of 26927781923 in words is "twenty-six billion, nine hundred twenty-seven million, seven hundred eighty-one thousand, nine hundred twenty-three".