21303940312 has 16 divisors (see below), whose sum is σ = 39974001840. Its totient is φ = 10644206496.

The previous prime is 21303940309. The next prime is 21303940321. The reversal of 21303940312 is 21304930312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958788 + ... + 980755.

It is an arithmetic number, because the mean of its divisors is an integer number (2498375115).

Almost surely, 2^21303940312 is an apocalyptic number.

It is an amenable number.

21303940312 is a deficient number, since it is larger than the sum of its proper divisors (18670061528).

21303940312 is a wasteful number, since it uses less digits than its factorization.

21303940312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940922 (or 1940918 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21303940312 in words is "twenty-one billion, three hundred three million, nine hundred forty thousand, three hundred twelve".