21411304043 has 4 divisors (see below), whose sum is σ = 21441848688. Its totient is φ = 21380759400.

The previous prime is 21411304027. The next prime is 21411304051. The reversal of 21411304043 is 34040311412.

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 21411304043 - 2⁴ = 21411304027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21411304063) 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, 15271271 + ... + 15272672.

It is an arithmetic number, because the mean of its divisors is an integer number (5360462172).

Almost surely, 2^21411304043 is an apocalyptic number.

21411304043 is a deficient number, since it is larger than the sum of its proper divisors (30544645).

21411304043 is an equidigital number, since it uses as much as digits as its factorization.

21411304043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30544644.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21411304043 its reverse (34040311412), we get a palindrome (55451615455).

The spelling of 21411304043 in words is "twenty-one billion, four hundred eleven million, three hundred four thousand, forty-three".