21320300312 has 32 divisors (see below), whose sum is σ = 40367970000. Its totient is φ = 10555689984.

The previous prime is 21320300263. The next prime is 21320300329. The reversal of 21320300312 is 21300302312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980939 + ... + 1002437.

Almost surely, 2^21320300312 is an apocalyptic number.

It is an amenable number.

21320300312 is a deficient number, since it is larger than the sum of its proper divisors (19047669688).

21320300312 is a wasteful number, since it uses less digits than its factorization.

21320300312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715 (or 22711 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21320300312 its reverse (21300302312), we get a palindrome (42620602624).

The spelling of 21320300312 in words is "twenty-one billion, three hundred twenty million, three hundred thousand, three hundred twelve".