21320302312 has 16 divisors (see below), whose sum is σ = 40905231840. Its totient is φ = 10412240496.

The previous prime is 21320302303. The next prime is 21320302313.

21320302312 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21320302312.

It is not an unprimeable number, because it can be changed into a prime (21320302313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30988468 + ... + 30989155.

It is an arithmetic number, because the mean of its divisors is an integer number (2556576990).

Almost surely, 2^21320302312 is an apocalyptic number.

It is an amenable number.

21320302312 is a deficient number, since it is larger than the sum of its proper divisors (19584929528).

21320302312 is a wasteful number, since it uses less digits than its factorization.

21320302312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61977672 (or 61977668 counting only the distinct ones).

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

The spelling of 21320302312 in words is "twenty-one billion, three hundred twenty million, three hundred two thousand, three hundred twelve".