21832064 has 64 divisors (see below), whose sum is σ = 47001600. Its totient is φ = 10068480.

The previous prime is 21832051. The next prime is 21832079. The reversal of 21832064 is 46023812.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114209 + ... + 114399.

It is an arithmetic number, because the mean of its divisors is an integer number (734400).

Almost surely, 2^21832064 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 21832064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23500800).

21832064 is an abundant number, since it is smaller than the sum of its proper divisors (25169536).

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

21832064 is a wasteful number, since it uses less digits than its factorization.

21832064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 21832064 is about 4672.4794274560. The cubic root of 21832064 is about 279.4891365173.

Adding to 21832064 its reverse (46023812), we get a palindrome (67855876).

The spelling of 21832064 in words is "twenty-one million, eight hundred thirty-two thousand, sixty-four".