21303323223 has 24 divisors (see below), whose sum is σ = 35151389568. Its totient is φ = 11236915872.

The previous prime is 21303323221. The next prime is 21303323299. The reversal of 21303323223 is 32232330312.

It is not a de Polignac number, because 21303323223 - 2¹ = 21303323221 is a prime.

It is a super-2 number, since 2×21303323223² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21303323193 and 21303323202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303323221) 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, 2997765 + ... + 3004862.

It is an arithmetic number, because the mean of its divisors is an integer number (1464641232).

Almost surely, 2^21303323223 is an apocalyptic number.

21303323223 is a deficient number, since it is larger than the sum of its proper divisors (13848066345).

21303323223 is a wasteful number, since it uses less digits than its factorization.

21303323223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002663 (or 6002650 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21303323223 its reverse (32232330312), we get a palindrome (53535653535).

The spelling of 21303323223 in words is "twenty-one billion, three hundred three million, three hundred twenty-three thousand, two hundred twenty-three".