21023302003 has 16 divisors (see below), whose sum is σ = 23114448000. Its totient is φ = 18962326080.

The previous prime is 21023301979. The next prime is 21023302121. The reversal of 21023302003 is 30020332012.

It is a cyclic number.

It is not a de Polignac number, because 21023302003 - 2²¹ = 21021204851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023309003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3043848 + ... + 3050746.

It is an arithmetic number, because the mean of its divisors is an integer number (1444653000).

Almost surely, 2^21023302003 is an apocalyptic number.

21023302003 is a deficient number, since it is larger than the sum of its proper divisors (2091145997).

21023302003 is a wasteful number, since it uses less digits than its factorization.

21023302003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9042.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21023302003 its reverse (30020332012), we get a palindrome (51043634015).

The spelling of 21023302003 in words is "twenty-one billion, twenty-three million, three hundred two thousand, three".