21002322303 has 32 divisors (see below), whose sum is σ = 31347993600. Its totient is φ = 13896757728.

The previous prime is 21002322259. The next prime is 21002322323. The reversal of 21002322303 is 30322320012.

It is a happy number.

It is not a de Polignac number, because 21002322303 - 2²¹ = 21000225151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002322323) 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 31 ways as a sum of consecutive naturals, for example, 3347053 + ... + 3353321.

It is an arithmetic number, because the mean of its divisors is an integer number (979624800).

Almost surely, 2^21002322303 is an apocalyptic number.

21002322303 is a deficient number, since it is larger than the sum of its proper divisors (10345671297).

21002322303 is a wasteful number, since it uses less digits than its factorization.

21002322303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188 (or 7182 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21002322303 its reverse (30322320012), we get a palindrome (51324642315).

The spelling of 21002322303 in words is "twenty-one billion, two million, three hundred twenty-two thousand, three hundred three".