21116592 has 80 divisors (see below), whose sum is σ = 69281280. Its totient is φ = 6032448.

The previous prime is 21116587. The next prime is 21116593. The reversal of 21116592 is 29561112.

21116592 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 659 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21116593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (866016).

Almost surely, 2^21116592 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 21116592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34640640).

21116592 is an abundant number, since it is smaller than the sum of its proper divisors (48164688).

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

21116592 is a wasteful number, since it uses less digits than its factorization.

21116592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007 (or 6995 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 21116592 is about 4595.2793168642. The cubic root of 21116592 is about 276.4020605204.

The spelling of 21116592 in words is "twenty-one million, one hundred sixteen thousand, five hundred ninety-two".