20847754753 has 4 divisors (see below), whose sum is σ = 23826005440. Its totient is φ = 17869504068.

The previous prime is 20847754709. The next prime is 20847754757. The reversal of 20847754753 is 35745774802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20847754753 - 2⁹ = 20847754241 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 20847754753.

It is not an unprimeable number, because it can be changed into a prime (20847754757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489125333 + ... + 1489125346.

It is an arithmetic number, because the mean of its divisors is an integer number (5956501360).

Almost surely, 2^20847754753 is an apocalyptic number.

It is an amenable number.

20847754753 is a deficient number, since it is larger than the sum of its proper divisors (2978250687).

20847754753 is an equidigital number, since it uses as much as digits as its factorization.

20847754753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2978250686.

The product of its (nonzero) digits is 6585600, while the sum is 52.

The spelling of 20847754753 in words is "twenty billion, eight hundred forty-seven million, seven hundred fifty-four thousand, seven hundred fifty-three".