20716772 has 12 divisors (see below), whose sum is σ = 36301440. Its totient is φ = 10344936.

The previous prime is 20716769. The next prime is 20716789. The reversal of 20716772 is 27761702.

It is a happy 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, 629 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (3025120).

Almost surely, 2^20716772 is an apocalyptic number.

It is an amenable number.

20716772 is a deficient number, since it is larger than the sum of its proper divisors (15584668).

20716772 is a wasteful number, since it uses less digits than its factorization.

20716772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730 (or 6728 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 20716772 is about 4551.5680814418. The cubic root of 20716772 is about 274.6464746470.

The spelling of 20716772 in words is "twenty million, seven hundred sixteen thousand, seven hundred seventy-two".