21404110303 has 16 divisors (see below), whose sum is σ = 21705314400. Its totient is φ = 21105657216.

The previous prime is 21404110241. The next prime is 21404110319. The reversal of 21404110303 is 30301140412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21404110303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404110373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13401901 + ... + 13403497.

It is an arithmetic number, because the mean of its divisors is an integer number (1356582150).

Almost surely, 2^21404110303 is an apocalyptic number.

21404110303 is a deficient number, since it is larger than the sum of its proper divisors (301204097).

21404110303 is a wasteful number, since it uses less digits than its factorization.

21404110303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21404110303 its reverse (30301140412), we get a palindrome (51705250715).

The spelling of 21404110303 in words is "twenty-one billion, four hundred four million, one hundred ten thousand, three hundred three".