21107425784013 has 32 divisors (see below), whose sum is σ = 33021903283200. Its totient is φ = 13288140687600.

The previous prime is 21107425783963. The next prime is 21107425784033. The reversal of 21107425784013 is 31048752470112.

It is a happy number.

21107425784013 is a `hidden beast` number, since 2 + 1 + 1 + 0 + 74 + 2 + 578 + 4 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 21107425784013 - 2²⁰ = 21107424735437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21107425784013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21107425784033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65990103 + ... + 66309188.

It is an arithmetic number, because the mean of its divisors is an integer number (1031934477600).

Almost surely, 2^{21107425784013} is an apocalyptic number.

It is an amenable number.

21107425784013 is a deficient number, since it is larger than the sum of its proper divisors (11914477499187).

21107425784013 is a wasteful number, since it uses less digits than its factorization.

21107425784013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132299630 (or 132299624 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 21107425784013 in words is "twenty-one trillion, one hundred seven billion, four hundred twenty-five million, seven hundred eighty-four thousand, thirteen".