20744670743 has 4 divisors (see below), whose sum is σ = 20754353088. Its totient is φ = 20734988400.

The previous prime is 20744670721. The next prime is 20744670757. The reversal of 20744670743 is 34707644702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20744670743 - 2²⁸ = 20476235287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20744670694 and 20744670703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744670773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4837958 + ... + 4842243.

It is an arithmetic number, because the mean of its divisors is an integer number (5188588272).

Almost surely, 2^20744670743 is an apocalyptic number.

20744670743 is a deficient number, since it is larger than the sum of its proper divisors (9682345).

20744670743 is an equidigital number, since it uses as much as digits as its factorization.

20744670743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9682344.

The product of its (nonzero) digits is 790272, while the sum is 44.

The spelling of 20744670743 in words is "twenty billion, seven hundred forty-four million, six hundred seventy thousand, seven hundred forty-three".