27420805723 has 4 divisors (see below), whose sum is σ = 27426531528. Its totient is φ = 27415079920.

The previous prime is 27420805703. The next prime is 27420805759. The reversal of 27420805723 is 32750802472.

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 27420805723 - 2¹⁷ = 27420674651 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27420805703) 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, 2855713 + ... + 2865298.

It is an arithmetic number, because the mean of its divisors is an integer number (6856632882).

Almost surely, 2^27420805723 is an apocalyptic number.

27420805723 is a deficient number, since it is larger than the sum of its proper divisors (5725805).

27420805723 is an equidigital number, since it uses as much as digits as its factorization.

27420805723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725804.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 27420805723 in words is "twenty-seven billion, four hundred twenty million, eight hundred five thousand, seven hundred twenty-three".