20812132 has 24 divisors (see below), whose sum is σ = 40410720. Its totient is φ = 9298560.

The previous prime is 20812123. The next prime is 20812139. The reversal of 20812132 is 23121802.

It is a super-3 number, since 3×20812132³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20812139) 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, 1413 + ... + 6604.

It is an arithmetic number, because the mean of its divisors is an integer number (1683780).

Almost surely, 2^20812132 is an apocalyptic number.

20812132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20812132 is a deficient number, since it is larger than the sum of its proper divisors (19598588).

20812132 is a wasteful number, since it uses less digits than its factorization.

20812132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091 (or 8089 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20812132 is about 4562.0315649938. The cubic root of 20812132 is about 275.0672320466.

Adding to 20812132 its reverse (23121802), we get a palindrome (43933934).

The spelling of 20812132 in words is "twenty million, eight hundred twelve thousand, one hundred thirty-two".