21341936 has 80 divisors (see below), whose sum is σ = 54639360. Its totient is φ = 7818240.

The previous prime is 21341927. The next prime is 21341951. The reversal of 21341936 is 63914312.

It is a junction number, because it is equal to n+sod(n) for n = 21341899 and 21341908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20435 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (682992).

Almost surely, 2^21341936 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 21341936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27319680).

21341936 is an abundant number, since it is smaller than the sum of its proper divisors (33297424).

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

21341936 is a wasteful number, since it uses less digits than its factorization.

21341936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1056 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 21341936 is about 4619.7333256369. The cubic root of 21341936 is about 277.3817844549.

The spelling of 21341936 in words is "twenty-one million, three hundred forty-one thousand, nine hundred thirty-six".