21943204704 has 36 divisors (see below), whose sum is σ = 62400989196. Its totient is φ = 7314401472.

The previous prime is 21943204693. The next prime is 21943204711. The reversal of 21943204704 is 40740234912.

21943204704 is a `hidden beast` number, since 219 + 432 + 0 + 4 + 7 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38095554 + ... + 38096129.

It is an arithmetic number, because the mean of its divisors is an integer number (1733360811).

Almost surely, 2^21943204704 is an apocalyptic number.

21943204704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21943204704 is an abundant number, since it is smaller than the sum of its proper divisors (40457784492).

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

21943204704 is a wasteful number, since it uses less digits than its factorization.

21943204704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76191699 (or 76191688 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21943204704 in words is "twenty-one billion, nine hundred forty-three million, two hundred four thousand, seven hundred four".