20427447307 has 4 divisors (see below), whose sum is σ = 20434962880. Its totient is φ = 20419931736.

The previous prime is 20427447289. The next prime is 20427447319. The reversal of 20427447307 is 70374472402.

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-20427447307 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 20427447307.

It is not an unprimeable number, because it can be changed into a prime (20427442307) 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, 3753708 + ... + 3759145.

It is an arithmetic number, because the mean of its divisors is an integer number (5108740720).

Almost surely, 2^20427447307 is an apocalyptic number.

20427447307 is a deficient number, since it is larger than the sum of its proper divisors (7515573).

20427447307 is an equidigital number, since it uses as much as digits as its factorization.

20427447307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515572.

The product of its (nonzero) digits is 263424, while the sum is 40.

The spelling of 20427447307 in words is "twenty billion, four hundred twenty-seven million, four hundred forty-seven thousand, three hundred seven".