20287932 has 48 divisors (see below), whose sum is σ = 56458752. Its totient is φ = 5544000.

The previous prime is 20287931. The next prime is 20287937. The reversal of 20287932 is 23978202.

It is a junction number, because it is equal to n+sod(n) for n = 20287893 and 20287902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3319 + ... + 7182.

It is an arithmetic number, because the mean of its divisors is an integer number (1176224).

Almost surely, 2^20287932 is an apocalyptic number.

It is an amenable number.

20287932 is an abundant number, since it is smaller than the sum of its proper divisors (36170820).

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

20287932 is a wasteful number, since it uses less digits than its factorization.

20287932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10538 (or 10536 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20287932 is about 4504.2126948003. The cubic root of 20287932 is about 272.7381729381.

The spelling of 20287932 in words is "twenty million, two hundred eighty-seven thousand, nine hundred thirty-two".