20688850 has 48 divisors (see below), whose sum is σ = 47371968. Its totient is φ = 6546240.

The previous prime is 20688827. The next prime is 20688869. The reversal of 20688850 is 5888602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2277 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (986916).

Almost surely, 2^20688850 is an apocalyptic number.

20688850 is an abundant number, since it is smaller than the sum of its proper divisors (26683118).

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

20688850 is a wasteful number, since it uses less digits than its factorization.

20688850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579 (or 4574 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 20688850 is about 4548.4997526657. The cubic root of 20688850 is about 274.5230299533.

The spelling of 20688850 in words is "twenty million, six hundred eighty-eight thousand, eight hundred fifty".