20436032 has 14 divisors (see below), whose sum is σ = 40552878. Its totient is φ = 10217984.

The previous prime is 20436019. The next prime is 20436041. The reversal of 20436032 is 23063402.

It can be written as a sum of positive squares in only one way, i.e., 10601536 + 9834496 = 3256^2 + 3136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20435995 and 20436013.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 159593 + ... + 159720.

Almost surely, 2^20436032 is an apocalyptic number.

It is an amenable number.

20436032 is a deficient number, since it is larger than the sum of its proper divisors (20116846).

20436032 is an equidigital number, since it uses as much as digits as its factorization.

20436032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319325 (or 319315 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20436032 is about 4520.6229659196. The cubic root of 20436032 is about 273.4002189412.

Adding to 20436032 its reverse (23063402), we get a palindrome (43499434).

The spelling of 20436032 in words is "twenty million, four hundred thirty-six thousand, thirty-two".