21416934 has 64 divisors (see below), whose sum is σ = 53932032. Its totient is φ = 5508000.

The previous prime is 21416909. The next prime is 21416953. The reversal of 21416934 is 43961412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69609 + ... + 69915.

It is an arithmetic number, because the mean of its divisors is an integer number (842688).

Almost surely, 2^21416934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21416934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26966016).

21416934 is an abundant number, since it is smaller than the sum of its proper divisors (32515098).

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

21416934 is a wasteful number, since it uses less digits than its factorization.

21416934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its digits is 5184, while the sum is 30.

The square root of 21416934 is about 4627.8433422060. The cubic root of 21416934 is about 277.7063216853.

The spelling of 21416934 in words is "twenty-one million, four hundred sixteen thousand, nine hundred thirty-four".