20801132 has 24 divisors (see below), whose sum is σ = 42048720. Its totient is φ = 8898560.

The previous prime is 20801117. The next prime is 20801167. The reversal of 20801132 is 23110802.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20801132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13157 + ... + 14652.

It is an arithmetic number, because the mean of its divisors is an integer number (1752030).

Almost surely, 2^20801132 is an apocalyptic number.

20801132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20801132 is an abundant number, since it is smaller than the sum of its proper divisors (21247588).

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

20801132 is a wasteful number, since it uses less digits than its factorization.

20801132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27841 (or 27839 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20801132 is about 4560.8258024178. The cubic root of 20801132 is about 275.0187623562.

Adding to 20801132 its reverse (23110802), we get a palindrome (43911934).

The spelling of 20801132 in words is "twenty million, eight hundred one thousand, one hundred thirty-two".