12403105543 has 4 divisors (see below), whose sum is σ = 12416343520. Its totient is φ = 12389867568.

The previous prime is 12403105541. The next prime is 12403105567. The reversal of 12403105543 is 34550130421.

12403105543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12403105543 - 2¹ = 12403105541 is a prime.

It is a super-2 number, since 2×12403105543² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403105541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6617583 + ... + 6619456.

It is an arithmetic number, because the mean of its divisors is an integer number (3104085880).

Almost surely, 2^12403105543 is an apocalyptic number.

12403105543 is a deficient number, since it is larger than the sum of its proper divisors (13237977).

12403105543 is an equidigital number, since it uses as much as digits as its factorization.

12403105543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13237976.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 12403105543 its reverse (34550130421), we get a palindrome (46953235964).

The spelling of 12403105543 in words is "twelve billion, four hundred three million, one hundred five thousand, five hundred forty-three".