21404411103 has 16 divisors (see below), whose sum is σ = 29023278336. Its totient is φ = 14028834240.

The previous prime is 21404411099. The next prime is 21404411113. The reversal of 21404411103 is 30111440412.

It is not a de Polignac number, because 21404411103 - 2² = 21404411099 is a prime.

It is a super-3 number, since 3×21404411103³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21404411103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404411113) 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, 89025 + ... + 225242.

It is an arithmetic number, because the mean of its divisors is an integer number (1813954896).

Almost surely, 2^21404411103 is an apocalyptic number.

21404411103 is a deficient number, since it is larger than the sum of its proper divisors (7618867233).

21404411103 is a wasteful number, since it uses less digits than its factorization.

21404411103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314654.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21404411103 its reverse (30111440412), we get a palindrome (51515851515).

The spelling of 21404411103 in words is "twenty-one billion, four hundred four million, four hundred eleven thousand, one hundred three".