20716746 has 16 divisors (see below), whose sum is σ = 42215904. Its totient is φ = 6775184.

The previous prime is 20716741. The next prime is 20716753. The reversal of 20716746 is 64761702.

It is not an unprimeable number, because it can be changed into a prime (20716741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32256 + ... + 32891.

It is an arithmetic number, because the mean of its divisors is an integer number (2638494).

Almost surely, 2^20716746 is an apocalyptic number.

20716746 is an abundant number, since it is smaller than the sum of its proper divisors (21499158).

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

20716746 is a wasteful number, since it uses less digits than its factorization.

20716746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65205.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20716746 is about 4551.5652252824. The cubic root of 20716746 is about 274.6463597512.

The spelling of 20716746 in words is "twenty million, seven hundred sixteen thousand, seven hundred forty-six".