21423222003 has 4 divisors (see below), whose sum is σ = 28564296008. Its totient is φ = 14282148000.

The previous prime is 21423222001. The next prime is 21423222013. The reversal of 21423222003 is 30022232412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21423222003 - 2¹ = 21423222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21423222001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3570536998 + ... + 3570537003.

It is an arithmetic number, because the mean of its divisors is an integer number (7141074002).

Almost surely, 2^21423222003 is an apocalyptic number.

21423222003 is a deficient number, since it is larger than the sum of its proper divisors (7141074005).

21423222003 is an equidigital number, since it uses as much as digits as its factorization.

21423222003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141074004.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21423222003 its reverse (30022232412), we get a palindrome (51445454415).

The spelling of 21423222003 in words is "twenty-one billion, four hundred twenty-three million, two hundred twenty-two thousand, three".