21936192 has 56 divisors (see below), whose sum is σ = 59411616. Its totient is φ = 7139328.

The previous prime is 21936191. The next prime is 21936217. The reversal of 21936192 is 29163912.

It is not an unprimeable number, because it can be changed into a prime (21936191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6928 + ... + 9584.

Almost surely, 2^21936192 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 21936192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29705808).

21936192 is an abundant number, since it is smaller than the sum of its proper divisors (37475424).

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

21936192 is a wasteful number, since it uses less digits than its factorization.

21936192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2705 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 21936192 is about 4683.6088649673. The cubic root of 21936192 is about 279.9327729760.

It can be divided in two parts, 219361 and 92, that added together give a triangular number (219453 = T₆₆₂).

The spelling of 21936192 in words is "twenty-one million, nine hundred thirty-six thousand, one hundred ninety-two".