21331000323 has 20 divisors (see below), whose sum is σ = 32180333328. Its totient is φ = 14079862800.

The previous prime is 21331000309. The next prime is 21331000333. The reversal of 21331000323 is 32300013312.

It is not a de Polignac number, because 21331000323 - 2⁴ = 21331000307 is a prime.

It is a super-2 number, since 2×21331000323² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21331000296 and 21331000305.

It is not an unprimeable number, because it can be changed into a prime (21331000303) 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 19 ways as a sum of consecutive naturals, for example, 1295511 + ... + 1311872.

Almost surely, 2^21331000323 is an apocalyptic number.

21331000323 is a deficient number, since it is larger than the sum of its proper divisors (10849333005).

21331000323 is a wasteful number, since it uses less digits than its factorization.

21331000323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607496 (or 2607487 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21331000323 its reverse (32300013312), we get a palindrome (53631013635).

The spelling of 21331000323 in words is "twenty-one billion, three hundred thirty-one million, three hundred twenty-three", and thus it is an aban number.