21323003003 has 4 divisors (see below), whose sum is σ = 21323434968. Its totient is φ = 21322571040.

The previous prime is 21323002999. The next prime is 21323003021. The reversal of 21323003003 is 30030032312.

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

It is a cyclic number.

It is not a de Polignac number, because 21323003003 - 2² = 21323002999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323003903) 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, 130718 + ... + 244403.

It is an arithmetic number, because the mean of its divisors is an integer number (5330858742).

Almost surely, 2^21323003003 is an apocalyptic number.

21323003003 is a deficient number, since it is larger than the sum of its proper divisors (431965).

21323003003 is an equidigital number, since it uses as much as digits as its factorization.

21323003003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431964.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 21323003003 its reverse (30030032312), we get a palindrome (51353035315).

The spelling of 21323003003 in words is "twenty-one billion, three hundred twenty-three million, three thousand, three".