20808832 has 32 divisors (see below), whose sum is σ = 45226800. Its totient is φ = 9457920.

The previous prime is 20808829. The next prime is 20808841. The reversal of 20808832 is 23880802.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 20808794 and 20808803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5982 + ... + 8797.

Almost surely, 2^20808832 is an apocalyptic number.

20808832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20808832 is an abundant number, since it is smaller than the sum of its proper divisors (24417968).

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

20808832 is a wasteful number, since it uses less digits than its factorization.

20808832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804 (or 14792 counting only the distinct ones).

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

The square root of 20808832 is about 4561.6698696859. The cubic root of 20808832 is about 275.0526929331.

The spelling of 20808832 in words is "twenty million, eight hundred eight thousand, eight hundred thirty-two".