20443712723 has 16 divisors (see below), whose sum is σ = 23848209600. Its totient is φ = 17517931200.

The previous prime is 20443712687. The next prime is 20443712753. The reversal of 20443712723 is 32721734402.

It is not a de Polignac number, because 20443712723 - 2²⁸ = 20175277267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443712753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516553 + ... + 1529973.

It is an arithmetic number, because the mean of its divisors is an integer number (1490513100).

Almost surely, 2^20443712723 is an apocalyptic number.

20443712723 is a deficient number, since it is larger than the sum of its proper divisors (3404496877).

20443712723 is an equidigital number, since it uses as much as digits as its factorization.

20443712723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17883 (or 17869 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 35.

The spelling of 20443712723 in words is "twenty billion, four hundred forty-three million, seven hundred twelve thousand, seven hundred twenty-three".