20005716 has 12 divisors (see below), whose sum is σ = 46680032. Its totient is φ = 6668568.

The previous prime is 20005709. The next prime is 20005717. The reversal of 20005716 is 61750002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20005692 and 20005701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833560 + ... + 833583.

Almost surely, 2^20005716 is an apocalyptic number.

It is an amenable number.

20005716 is an abundant number, since it is smaller than the sum of its proper divisors (26674316).

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

20005716 is a wasteful number, since it uses less digits than its factorization.

20005716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667150 (or 1667148 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20005716 is about 4472.7749775726. The cubic root of 20005716 is about 271.4676185482.

Adding to 20005716 its reverse (61750002), we get a palindrome (81755718).

The spelling of 20005716 in words is "twenty million, five thousand, seven hundred sixteen".