20887132 has 36 divisors (see below), whose sum is σ = 43242024. Its totient is φ = 8799840.

The previous prime is 20887109. The next prime is 20887133. The reversal of 20887132 is 23178802.

It is a junction number, because it is equal to n+sod(n) for n = 20887094 and 20887103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11083 + ... + 12829.

Almost surely, 2^20887132 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 20887132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21621012).

20887132 is an abundant number, since it is smaller than the sum of its proper divisors (22354892).

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

20887132 is a wasteful number, since it uses less digits than its factorization.

20887132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20887132 is about 4570.2441947887. The cubic root of 20887132 is about 275.3972528670.

The spelling of 20887132 in words is "twenty million, eight hundred eighty-seven thousand, one hundred thirty-two".