20589688 has 16 divisors (see below), whose sum is σ = 44120880. Its totient is φ = 8824128.

The previous prime is 20589677. The next prime is 20589707. The reversal of 20589688 is 88698502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183781 + ... + 183892.

It is an arithmetic number, because the mean of its divisors is an integer number (2757555).

Almost surely, 2^20589688 is an apocalyptic number.

20589688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20589688 is an abundant number, since it is smaller than the sum of its proper divisors (23531192).

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

20589688 is a wasteful number, since it uses less digits than its factorization.

20589688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367686 (or 367682 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 20589688 is about 4537.5861424330. The cubic root of 20589688 is about 274.0837295393.

The spelling of 20589688 in words is "twenty million, five hundred eighty-nine thousand, six hundred eighty-eight".