21343430003 has 16 divisors (see below), whose sum is σ = 24504754176. Its totient is φ = 18210323040.

The previous prime is 21343429993. The next prime is 21343430021. The reversal of 21343430003 is 30003434312.

It is not a de Polignac number, because 21343430003 - 2²⁸ = 21074994547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21343430503) 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 15 ways as a sum of consecutive naturals, for example, 1862750 + ... + 1874172.

It is an arithmetic number, because the mean of its divisors is an integer number (1531547136).

Almost surely, 2^21343430003 is an apocalyptic number.

21343430003 is a deficient number, since it is larger than the sum of its proper divisors (3161324173).

21343430003 is a wasteful number, since it uses less digits than its factorization.

21343430003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12634.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21343430003 its reverse (30003434312), we get a palindrome (51346864315).

The spelling of 21343430003 in words is "twenty-one billion, three hundred forty-three million, four hundred thirty thousand, three".