20071263247 has 4 divisors (see below), whose sum is σ = 22938586576. Its totient is φ = 17203939920.

The previous prime is 20071263241. The next prime is 20071263257. The reversal of 20071263247 is 74236217002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74236217002 = 2 ⋅37118108501.

It is a cyclic number.

It is not a de Polignac number, because 20071263247 - 2³ = 20071263239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071263241) 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, 1433661654 + ... + 1433661667.

It is an arithmetic number, because the mean of its divisors is an integer number (5734646644).

Almost surely, 2^20071263247 is an apocalyptic number.

20071263247 is a deficient number, since it is larger than the sum of its proper divisors (2867323329).

20071263247 is an equidigital number, since it uses as much as digits as its factorization.

20071263247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867323328.

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 20071263247 in words is "twenty billion, seventy-one million, two hundred sixty-three thousand, two hundred forty-seven".