21323000331 has 16 divisors (see below), whose sum is σ = 31753314720. Its totient is φ = 14141675520.

The previous prime is 21323000327. The next prime is 21323000341. The reversal of 21323000331 is 13300032312.

21323000331 is a `hidden beast` number, since 2 + 1 + 32 + 300 + 0 + 331 = 666.

It is not a de Polignac number, because 21323000331 - 2² = 21323000327 is a prime.

It is a super-2 number, since 2×21323000331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21323000341) 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 15 ways as a sum of consecutive naturals, for example, 2040750 + ... + 2051171.

It is an arithmetic number, because the mean of its divisors is an integer number (1984582170).

Almost surely, 2^21323000331 is an apocalyptic number.

21323000331 is a deficient number, since it is larger than the sum of its proper divisors (10430314389).

21323000331 is a wasteful number, since it uses less digits than its factorization.

21323000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092123 (or 4092117 counting only the distinct ones).

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

Adding to 21323000331 its reverse (13300032312), we get a palindrome (34623032643).

The spelling of 21323000331 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-one", and thus it is an aban number.