21324203003 has 8 divisors (see below), whose sum is σ = 22288380576. Its totient is φ = 20363112000.

The previous prime is 21324202981. The next prime is 21324203051. The reversal of 21324203003 is 30030242312.

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 21324203003 - 2⁸ = 21324202747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21324203603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757508 + ... + 785153.

It is an arithmetic number, because the mean of its divisors is an integer number (2786047572).

Almost surely, 2^21324203003 is an apocalyptic number.

21324203003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21324203003 is a deficient number, since it is larger than the sum of its proper divisors (964177573).

21324203003 is a wasteful number, since it uses less digits than its factorization.

21324203003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543285.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21324203003 its reverse (30030242312), we get a palindrome (51354445315).

The spelling of 21324203003 in words is "twenty-one billion, three hundred twenty-four million, two hundred three thousand, three".