20632688 has 40 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 9761024.

The previous prime is 20632663. The next prime is 20632691. The reversal of 20632688 is 88623602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24173 + ... + 25011.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20632688 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 20632688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21092400).

20632688 is an abundant number, since it is smaller than the sum of its proper divisors (21552112).

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

20632688 is a wasteful number, since it uses less digits than its factorization.

20632688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 20632688 is about 4542.3218732274. The cubic root of 20632688 is about 274.2743978879.

The spelling of 20632688 in words is "twenty million, six hundred thirty-two thousand, six hundred eighty-eight".