20744668743 has 8 divisors (see below), whose sum is σ = 28049129856. Its totient is φ = 13634993400.

The previous prime is 20744668733. The next prime is 20744668759. The reversal of 20744668743 is 34786644702.

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

It is not a de Polignac number, because 20744668743 - 2¹³ = 20744660551 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744668733) 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 7 ways as a sum of consecutive naturals, for example, 48696193 + ... + 48696618.

It is an arithmetic number, because the mean of its divisors is an integer number (3506141232).

Almost surely, 2^20744668743 is an apocalyptic number.

20744668743 is a deficient number, since it is larger than the sum of its proper divisors (7304461113).

20744668743 is an equidigital number, since it uses as much as digits as its factorization.

20744668743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97392885.

The product of its (nonzero) digits is 5419008, while the sum is 51.

The spelling of 20744668743 in words is "twenty billion, seven hundred forty-four million, six hundred sixty-eight thousand, seven hundred forty-three".