21344024403 has 24 divisors (see below), whose sum is σ = 34645377312. Its totient is φ = 12563705088.

The previous prime is 21344024393. The next prime is 21344024417. The reversal of 21344024403 is 30442044312.

It is a happy number.

21344024403 is a `hidden beast` number, since 213 + 4 + 4 + 0 + 2 + 440 + 3 = 666.

It is not a de Polignac number, because 21344024403 - 2⁵ = 21344024371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21344024003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3963126 + ... + 3968507.

It is an arithmetic number, because the mean of its divisors is an integer number (1443557388).

Almost surely, 2^21344024403 is an apocalyptic number.

21344024403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21344024403 is a deficient number, since it is larger than the sum of its proper divisors (13301352909).

21344024403 is a wasteful number, since it uses less digits than its factorization.

21344024403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931675 (or 7931672 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21344024403 its reverse (30442044312), we get a palindrome (51786068715).

The spelling of 21344024403 in words is "twenty-one billion, three hundred forty-four million, twenty-four thousand, four hundred three".