20616832 has 64 divisors (see below), whose sum is σ = 44064000. Its totient is φ = 9585664.

The previous prime is 20616803. The next prime is 20616863. The reversal of 20616832 is 23861602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20616832.

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, 138294 + ... + 138442.

It is an arithmetic number, because the mean of its divisors is an integer number (688500).

Almost surely, 2^20616832 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 20616832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22032000).

20616832 is an abundant number, since it is smaller than the sum of its proper divisors (23447168).

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

20616832 is a wasteful number, since it uses less digits than its factorization.

20616832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20616832 is about 4540.5761748923. The cubic root of 20616832 is about 274.2041209023.

The spelling of 20616832 in words is "twenty million, six hundred sixteen thousand, eight hundred thirty-two".