21344011043 has 8 divisors (see below), whose sum is σ = 21673041600. Its totient is φ = 21015288360.

The previous prime is 21344011009. The next prime is 21344011069. The reversal of 21344011043 is 34011044312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21344011043 - 2²⁴ = 21327233827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344011543) 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 7 ways as a sum of consecutive naturals, for example, 64748 + ... + 216518.

It is an arithmetic number, because the mean of its divisors is an integer number (2709130200).

Almost surely, 2^21344011043 is an apocalyptic number.

21344011043 is a deficient number, since it is larger than the sum of its proper divisors (329030557).

21344011043 is a wasteful number, since it uses less digits than its factorization.

21344011043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153937.

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

Adding to 21344011043 its reverse (34011044312), we get a palindrome (55355055355).

The spelling of 21344011043 in words is "twenty-one billion, three hundred forty-four million, eleven thousand, forty-three".