21423233003 has 16 divisors (see below), whose sum is σ = 22278512256. Its totient is φ = 20586303360.

The previous prime is 21423232997. The next prime is 21423233053. The reversal of 21423233003 is 30033232412.

It is a cyclic number.

It is not a de Polignac number, because 21423233003 - 2²² = 21419038699 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 21423233003.

It is not an unprimeable number, because it can be changed into a prime (21423233053) 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 15 ways as a sum of consecutive naturals, for example, 847676 + ... + 872582.

It is an arithmetic number, because the mean of its divisors is an integer number (1392407016).

Almost surely, 2^21423233003 is an apocalyptic number.

21423233003 is a deficient number, since it is larger than the sum of its proper divisors (855279253).

21423233003 is a wasteful number, since it uses less digits than its factorization.

21423233003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25274.

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

Adding to 21423233003 its reverse (30033232412), we get a palindrome (51456465415).

The spelling of 21423233003 in words is "twenty-one billion, four hundred twenty-three million, two hundred thirty-three thousand, three".