20032543 has 2 divisors, whose sum is σ = 20032544. Its totient is φ = 20032542.

The previous prime is 20032513. The next prime is 20032547. The reversal of 20032543 is 34523002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20032543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20032543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20032547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016271 + 10016272.

It is an arithmetic number, because the mean of its divisors is an integer number (10016272).

Almost surely, 2^20032543 is an apocalyptic number.

20032543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20032543 is an equidigital number, since it uses as much as digits as its factorization.

20032543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20032543 is about 4475.7728941491. The cubic root of 20032543 is about 271.5889073664.

Adding to 20032543 its reverse (34523002), we get a palindrome (54555545).

The spelling of 20032543 in words is "twenty million, thirty-two thousand, five hundred forty-three".