21383964072712 has 32 divisors (see below), whose sum is σ = 40837159958400. Its totient is φ = 10495619394624.

The previous prime is 21383964072703. The next prime is 21383964072727. The reversal of 21383964072712 is 21727046938312.

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, 97680798 + ... + 97899469.

It is an arithmetic number, because the mean of its divisors is an integer number (1276161248700).

Almost surely, 2^{21383964072712} is an apocalyptic number.

It is an amenable number.

21383964072712 is a deficient number, since it is larger than the sum of its proper divisors (19453195885688).

21383964072712 is a wasteful number, since it uses less digits than its factorization.

21383964072712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195580525 (or 195580521 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 21383964072712 in words is "twenty-one trillion, three hundred eighty-three billion, nine hundred sixty-four million, seventy-two thousand, seven hundred twelve".