20716608 has 112 divisors (see below), whose sum is σ = 63422784. Its totient is φ = 5898240.

The previous prime is 20716589. The next prime is 20716609. The reversal of 20716608 is 80661702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35616 + ... + 36192.

Almost surely, 2^20716608 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 20716608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31711392).

20716608 is an abundant number, since it is smaller than the sum of its proper divisors (42706176).

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

20716608 is a wasteful number, since it uses less digits than its factorization.

20716608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20716608 is about 4551.5500656370. The cubic root of 20716608 is about 274.6457499179.

The spelling of 20716608 in words is "twenty million, seven hundred sixteen thousand, six hundred eight".