21403310003 has 8 divisors (see below), whose sum is σ = 21494380656. Its totient is φ = 21312345600.

The previous prime is 21403309987. The next prime is 21403310021. The reversal of 21403310003 is 30001330412.

It is a happy number.

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 21403310003 - 2⁴ = 21403309987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403310023) 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 7 ways as a sum of consecutive naturals, for example, 391043 + ... + 442403.

It is an arithmetic number, because the mean of its divisors is an integer number (2686797582).

Almost surely, 2^21403310003 is an apocalyptic number.

21403310003 is a deficient number, since it is larger than the sum of its proper divisors (91070653).

21403310003 is a wasteful number, since it uses less digits than its factorization.

21403310003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53125.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21403310003 its reverse (30001330412), we get a palindrome (51404640415).

The spelling of 21403310003 in words is "twenty-one billion, four hundred three million, three hundred ten thousand, three".