20843000743 has 2 divisors, whose sum is σ = 20843000744. Its totient is φ = 20843000742.

The previous prime is 20843000681. The next prime is 20843000749. The reversal of 20843000743 is 34700034802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20843000743 - 2³³ = 12253066151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20843000749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10421500371 + 10421500372.

It is an arithmetic number, because the mean of its divisors is an integer number (10421500372).

Almost surely, 2^20843000743 is an apocalyptic number.

20843000743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20843000743 is an equidigital number, since it uses as much as digits as its factorization.

20843000743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 20843000743 in words is "twenty billion, eight hundred forty-three million, seven hundred forty-three", and thus it is an aban number.