21324400003 has 8 divisors (see below), whose sum is σ = 21383066880. Its totient is φ = 21265795080.

The previous prime is 21324399961. The next prime is 21324400049. The reversal of 21324400003 is 30000442312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21324400003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21324400703) 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, 721368 + ... + 750346.

It is an arithmetic number, because the mean of its divisors is an integer number (2672883360).

Almost surely, 2^21324400003 is an apocalyptic number.

21324400003 is a deficient number, since it is larger than the sum of its proper divisors (58666877).

21324400003 is a wasteful number, since it uses less digits than its factorization.

21324400003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30977.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21324400003 its reverse (30000442312), we get a palindrome (51324842315).

The spelling of 21324400003 in words is "twenty-one billion, three hundred twenty-four million, four hundred thousand, three".