20812032 has 72 divisors (see below), whose sum is σ = 61565280. Its totient is φ = 6935040.

The previous prime is 20812021. The next prime is 20812039. The reversal of 20812032 is 23021802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20811996 and 20812014.

It is not an unprimeable number, because it can be changed into a prime (20812039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5407 + ... + 8417.

Almost surely, 2^20812032 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 20812032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30782640).

20812032 is an abundant number, since it is smaller than the sum of its proper divisors (40753248).

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

20812032 is an equidigital number, since it uses as much as digits as its factorization.

20812032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3016 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20812032 is about 4562.0206049513. The cubic root of 20812032 is about 275.0667914900.

Adding to 20812032 its reverse (23021802), we get a palindrome (43833834).

The spelling of 20812032 in words is "twenty million, eight hundred twelve thousand, thirty-two".