21412003443 has 4 divisors (see below), whose sum is σ = 28549337928. Its totient is φ = 14274668960.

The previous prime is 21412003411. The next prime is 21412003453. The reversal of 21412003443 is 34430021412.

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 21412003443 - 2⁵ = 21412003411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21412003453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568667238 + ... + 3568667243.

It is an arithmetic number, because the mean of its divisors is an integer number (7137334482).

Almost surely, 2^21412003443 is an apocalyptic number.

21412003443 is a deficient number, since it is larger than the sum of its proper divisors (7137334485).

21412003443 is an equidigital number, since it uses as much as digits as its factorization.

21412003443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137334484.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21412003443 its reverse (34430021412), we get a palindrome (55842024855).

The spelling of 21412003443 in words is "twenty-one billion, four hundred twelve million, three thousand, four hundred forty-three".