21792108 has 48 divisors (see below), whose sum is σ = 56659680. Its totient is φ = 6472704.

The previous prime is 21792103. The next prime is 21792119. The reversal of 21792108 is 80129712.

It is not an unprimeable number, because it can be changed into a prime (21792103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2116 + ... + 6932.

It is an arithmetic number, because the mean of its divisors is an integer number (1180410).

Almost surely, 2^21792108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21792108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28329840).

21792108 is an abundant number, since it is smaller than the sum of its proper divisors (34867572).

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

21792108 is a wasteful number, since it uses less digits than its factorization.

21792108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866 (or 4864 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 21792108 is about 4668.2017951241. The cubic root of 21792108 is about 279.3185298433.

The spelling of 21792108 in words is "twenty-one million, seven hundred ninety-two thousand, one hundred eight".