20840832 has 96 divisors (see below), whose sum is σ = 60996000. Its totient is φ = 6829056.

The previous prime is 20840789. The next prime is 20840837. The reversal of 20840832 is 23804802.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 20840796 and 20840805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20840837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90894 + ... + 91122.

It is an arithmetic number, because the mean of its divisors is an integer number (635375).

Almost surely, 2^20840832 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 20840832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30498000).

20840832 is an abundant number, since it is smaller than the sum of its proper divisors (40155168).

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

20840832 is a wasteful number, since it uses less digits than its factorization.

20840832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20840832 is about 4565.1760097503. The cubic root of 20840832 is about 275.1936135168.

The spelling of 20840832 in words is "twenty million, eight hundred forty thousand, eight hundred thirty-two".