20001132 has 36 divisors (see below), whose sum is σ = 51638496. Its totient is φ = 6524640.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001132 is 23110002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20001139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4219 + ... + 7602.

Almost surely, 2^20001132 is an apocalyptic number.

It is an amenable number.

20001132 is an abundant number, since it is smaller than the sum of its proper divisors (31637364).

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

20001132 is a wasteful number, since it uses less digits than its factorization.

20001132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11878 (or 11873 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20001132 is about 4472.2625146563. The cubic root of 20001132 is about 271.4468827641.

Adding to 20001132 its reverse (23110002), we get a palindrome (43111134).

The spelling of 20001132 in words is "twenty million, one thousand, one hundred thirty-two".