20075543 has 2 divisors, whose sum is σ = 20075544. Its totient is φ = 20075542.

The previous prime is 20075537. The next prime is 20075551. The reversal of 20075543 is 34557002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20075543 - 2¹⁸ = 19813399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20075563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10037771 + 10037772.

It is an arithmetic number, because the mean of its divisors is an integer number (10037772).

Almost surely, 2^20075543 is an apocalyptic number.

20075543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20075543 is an equidigital number, since it uses as much as digits as its factorization.

20075543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20075543 is about 4480.5739587691. The cubic root of 20075543 is about 271.7830910188.

The spelling of 20075543 in words is "twenty million, seventy-five thousand, five hundred forty-three".