20716320 has 48 divisors (see below), whose sum is σ = 65257920. Its totient is φ = 5524224.

The previous prime is 20716313. The next prime is 20716343. The reversal of 20716320 is 2361702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21100 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (1359540).

Almost surely, 2^20716320 is an apocalyptic number.

20716320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20716320 is an abundant number, since it is smaller than the sum of its proper divisors (44541600).

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

20716320 is a wasteful number, since it uses less digits than its factorization.

20716320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43177 (or 43169 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20716320 is about 4551.5184279535. The cubic root of 20716320 is about 274.6444772137.

The spelling of 20716320 in words is "twenty million, seven hundred sixteen thousand, three hundred twenty".