20047543 has 2 divisors, whose sum is σ = 20047544. Its totient is φ = 20047542.

The previous prime is 20047537. The next prime is 20047561. The reversal of 20047543 is 34574002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20047543 - 2¹³ = 20039351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20047523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10023771 + 10023772.

It is an arithmetic number, because the mean of its divisors is an integer number (10023772).

Almost surely, 2^20047543 is an apocalyptic number.

20047543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20047543 is an equidigital number, since it uses as much as digits as its factorization.

20047543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20047543 is about 4477.4482688246. The cubic root of 20047543 is about 271.6566773816.

The spelling of 20047543 in words is "twenty million, forty-seven thousand, five hundred forty-three".