20743444789 has 2 divisors, whose sum is σ = 20743444790. Its totient is φ = 20743444788.

The previous prime is 20743444763. The next prime is 20743444819. The reversal of 20743444789 is 98744434702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18260116900 + 2483327889 = 135130^2 + 49833^2 .

It is a cyclic number.

It is not a de Polignac number, because 20743444789 - 2⁷ = 20743444661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20743444739) 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 as a sum of consecutive naturals, namely, 10371722394 + 10371722395.

It is an arithmetic number, because the mean of its divisors is an integer number (10371722395).

Almost surely, 2^20743444789 is an apocalyptic number.

It is an amenable number.

20743444789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20743444789 is an equidigital number, since it uses as much as digits as its factorization.

20743444789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 52.

The spelling of 20743444789 in words is "twenty billion, seven hundred forty-three million, four hundred forty-four thousand, seven hundred eighty-nine".