20880832 has 56 divisors (see below), whose sum is σ = 47857664. Its totient is φ = 8854272.

The previous prime is 20880809. The next prime is 20880833. The reversal of 20880832 is 23808802.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 20880794 and 20880803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56713 + ... + 57079.

Almost surely, 2^20880832 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 20880832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23928832).

20880832 is an abundant number, since it is smaller than the sum of its proper divisors (26976832).

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

20880832 is a wasteful number, since it uses less digits than its factorization.

20880832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 20880832 is about 4569.5549017382. The cubic root of 20880832 is about 275.3695615407.

It can be divided in two parts, 20880 and 832, that added together give a palindrome (21712).

The spelling of 20880832 in words is "twenty million, eight hundred eighty thousand, eight hundred thirty-two".