21835168868704 has 24 divisors (see below), whose sum is σ = 42988338828288. Its totient is φ = 10917495515520.

The previous prime is 21835168868699. The next prime is 21835168868707. The reversal of 21835168868704 is 40786886153812.

It is a self number, because there is not a number n which added to its sum of digits gives 21835168868704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21835168868707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1303969 + ... + 6735775.

It is an arithmetic number, because the mean of its divisors is an integer number (1791180784512).

Almost surely, 2^{21835168868704} is an apocalyptic number.

It is an amenable number.

21835168868704 is a deficient number, since it is larger than the sum of its proper divisors (21153169959584).

21835168868704 is a wasteful number, since it uses less digits than its factorization.

21835168868704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557438 (or 5557430 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 67.

The spelling of 21835168868704 in words is "twenty-one trillion, eight hundred thirty-five billion, one hundred sixty-eight million, eight hundred sixty-eight thousand, seven hundred four".