21344204003 has 4 divisors (see below), whose sum is σ = 21662774280. Its totient is φ = 21025633728.

The previous prime is 21344203997. The next prime is 21344204009. The reversal of 21344204003 is 30040244312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21344203997) and next prime (21344204009).

It is a cyclic number.

It is not a de Polignac number, because 21344204003 - 2⁶ = 21344203939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21344204003.

It is not an unprimeable number, because it can be changed into a prime (21344204009) 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, 159285038 + ... + 159285171.

It is an arithmetic number, because the mean of its divisors is an integer number (5415693570).

Almost surely, 2^21344204003 is an apocalyptic number.

21344204003 is a deficient number, since it is larger than the sum of its proper divisors (318570277).

21344204003 is an equidigital number, since it uses as much as digits as its factorization.

21344204003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318570276.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21344204003 its reverse (30040244312), we get a palindrome (51384448315).

The spelling of 21344204003 in words is "twenty-one billion, three hundred forty-four million, two hundred four thousand, three".