20715696 has 80 divisors (see below), whose sum is σ = 60313600. Its totient is φ = 6806592.

The previous prime is 20715691. The next prime is 20715697. The reversal of 20715696 is 69651702.

20715696 is a `hidden beast` number, since 20 + 71 + 569 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20715696.

It is not an unprimeable number, because it can be changed into a prime (20715691) 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, 33825 + ... + 34431.

It is an arithmetic number, because the mean of its divisors is an integer number (753920).

Almost surely, 2^20715696 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 20715696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30156800).

20715696 is an abundant number, since it is smaller than the sum of its proper divisors (39597904).

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

20715696 is a wasteful number, since it uses less digits than its factorization.

20715696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20715696 is about 4551.4498788847. The cubic root of 20715696 is about 274.6417196475.

It can be divided in two parts, 20 and 715696, that added together give a square (715716 = 846²).

The spelling of 20715696 in words is "twenty million, seven hundred fifteen thousand, six hundred ninety-six".