21023202303 has 24 divisors (see below), whose sum is σ = 32162949936. Its totient is φ = 13187001600.

The previous prime is 21023202259. The next prime is 21023202307. The reversal of 21023202303 is 30320232012.

It is a happy number.

It is not a de Polignac number, because 21023202303 - 2⁸ = 21023202047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023202307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 528708 + ... + 567078.

It is an arithmetic number, because the mean of its divisors is an integer number (1340122914).

Almost surely, 2^21023202303 is an apocalyptic number.

21023202303 is a deficient number, since it is larger than the sum of its proper divisors (11139747633).

21023202303 is a wasteful number, since it uses less digits than its factorization.

21023202303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41975 (or 41972 counting only the distinct ones).

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

Adding to 21023202303 its reverse (30320232012), we get a palindrome (51343434315).

The spelling of 21023202303 in words is "twenty-one billion, twenty-three million, two hundred two thousand, three hundred three".