20332636 has 12 divisors (see below), whose sum is σ = 36409912. Its totient is φ = 9929808.

The previous prime is 20332633. The next prime is 20332643. The reversal of 20332636 is 63623302.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20332636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58935 + ... + 59278.

Almost surely, 2^20332636 is an apocalyptic number.

It is an amenable number.

20332636 is a deficient number, since it is larger than the sum of its proper divisors (16077276).

20332636 is a wasteful number, since it uses less digits than its factorization.

20332636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118260 (or 118258 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 20332636 is about 4509.1724296150. The cubic root of 20332636 is about 272.9383501163.

Adding to 20332636 its reverse (63623302), we get a palindrome (83955938).

The spelling of 20332636 in words is "twenty million, three hundred thirty-two thousand, six hundred thirty-six".