21323002312 has 32 divisors (see below), whose sum is σ = 40314193920. Its totient is φ = 10572629760.

The previous prime is 21323002277. The next prime is 21323002319. The reversal of 21323002312 is 21320032312.

It is a self number, because there is not a number n which added to its sum of digits gives 21323002312.

It is not an unprimeable number, because it can be changed into a prime (21323002319) 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 7 ways as a sum of consecutive naturals, for example, 3238768 + ... + 3245344.

It is an arithmetic number, because the mean of its divisors is an integer number (1259818560).

Almost surely, 2^21323002312 is an apocalyptic number.

It is an amenable number.

21323002312 is a deficient number, since it is larger than the sum of its proper divisors (18991191608).

21323002312 is a wasteful number, since it uses less digits than its factorization.

21323002312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901 (or 9897 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21323002312 its reverse (21320032312), we get a palindrome (42643034624).

The spelling of 21323002312 in words is "twenty-one billion, three hundred twenty-three million, two thousand, three hundred twelve".