21032434543 has 2 divisors, whose sum is σ = 21032434544. Its totient is φ = 21032434542.

The previous prime is 21032434537. The next prime is 21032434589. The reversal of 21032434543 is 34543423012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21032434543 - 2²⁹ = 20495563631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032434513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516217271 + 10516217272.

It is an arithmetic number, because the mean of its divisors is an integer number (10516217272).

Almost surely, 2^21032434543 is an apocalyptic number.

21032434543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032434543 is an equidigital number, since it uses as much as digits as its factorization.

21032434543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 21032434543 its reverse (34543423012), we get a palindrome (55575857555).

The spelling of 21032434543 in words is "twenty-one billion, thirty-two million, four hundred thirty-four thousand, five hundred forty-three".