21214743180648 has 32 divisors (see below), whose sum is σ = 53583629688960. Its totient is φ = 6998678161920.

The previous prime is 21214743180643. The next prime is 21214743180649. The reversal of 21214743180648 is 84608134741212.

It is a self number, because there is not a number n which added to its sum of digits gives 21214743180648.

It is not an unprimeable number, because it can be changed into a prime (21214743180641) 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 7 ways as a sum of consecutive naturals, for example, 4556428768 + ... + 4556433423.

It is an arithmetic number, because the mean of its divisors is an integer number (1674488427780).

Almost surely, 2^{21214743180648} is an apocalyptic number.

It is an amenable number.

21214743180648 is an abundant number, since it is smaller than the sum of its proper divisors (32368886508312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21214743180648 is a wasteful number, since it uses less digits than its factorization.

21214743180648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112862297 (or 9112862293 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 21214743180648 in words is "twenty-one trillion, two hundred fourteen billion, seven hundred forty-three million, one hundred eighty thousand, six hundred forty-eight".