20881032 has 64 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 6435840.

The previous prime is 20881027. The next prime is 20881067. The reversal of 20881032 is 23018802.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20880993 and 20881011.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24469 + ... + 25307.

It is an arithmetic number, because the mean of its divisors is an integer number (878850).

Almost surely, 2^20881032 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 20881032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

20881032 is an abundant number, since it is smaller than the sum of its proper divisors (35365368).

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

20881032 is a wasteful number, since it uses less digits than its factorization.

20881032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20881032 is about 4569.5767856553. The cubic root of 20881032 is about 275.3704407160.

Adding to 20881032 its reverse (23018802), we get a palindrome (43899834).

The spelling of 20881032 in words is "twenty million, eight hundred eighty-one thousand, thirty-two".