20427000805 has 8 divisors (see below), whose sum is σ = 24513184800. Its totient is φ = 16341078096.

The previous prime is 20427000791. The next prime is 20427000821. The reversal of 20427000805 is 50800072402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20427000805 - 2¹³ = 20426992613 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 219906 + ... + 298684.

It is an arithmetic number, because the mean of its divisors is an integer number (3064148100).

Almost surely, 2^20427000805 is an apocalyptic number.

It is an amenable number.

20427000805 is a deficient number, since it is larger than the sum of its proper divisors (4086183995).

20427000805 is an equidigital number, since it uses as much as digits as its factorization.

20427000805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130643.

The product of its (nonzero) digits is 4480, while the sum is 28.

The spelling of 20427000805 in words is "twenty billion, four hundred twenty-seven million, eight hundred five", and thus it is an aban number.