20636532 has 96 divisors (see below), whose sum is σ = 62083840. Its totient is φ = 5878656.

The previous prime is 20636513. The next prime is 20636549. The reversal of 20636532 is 23563602.

20636532 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 653 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20636496 and 20636505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61068 + ... + 61404.

Almost surely, 2^20636532 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 20636532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31041920).

20636532 is an abundant number, since it is smaller than the sum of its proper divisors (41447308).

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

20636532 is an equidigital number, since it uses as much as digits as its factorization.

20636532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 20636532 is about 4542.7449851384. The cubic root of 20636532 is about 274.2914298474.

The spelling of 20636532 in words is "twenty million, six hundred thirty-six thousand, five hundred thirty-two".