21068743787012 has 24 divisors (see below), whose sum is σ = 39210955623840. Its totient is φ = 9877045374720.

The previous prime is 21068743786999. The next prime is 21068743787017. The reversal of 21068743787012 is 21078734786012.

It is not an unprimeable number, because it can be changed into a prime (21068743787017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428963314 + ... + 1428978057.

It is an arithmetic number, because the mean of its divisors is an integer number (1633789817660).

Almost surely, 2^{21068743787012} is an apocalyptic number.

It is an amenable number.

21068743787012 is a deficient number, since it is larger than the sum of its proper divisors (18142211836828).

21068743787012 is a wasteful number, since it uses less digits than its factorization.

21068743787012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857941491 (or 2857941489 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 21068743787012 in words is "twenty-one trillion, sixty-eight billion, seven hundred forty-three million, seven hundred eighty-seven thousand, twelve".