20707968 has 32 divisors (see below), whose sum is σ = 55006560. Its totient is φ = 6902528.

The previous prime is 20707963. The next prime is 20707979. The reversal of 20707968 is 86970702.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (20707963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26580 + ... + 27347.

It is an arithmetic number, because the mean of its divisors is an integer number (1718955).

Almost surely, 2^20707968 is an apocalyptic number.

It is an amenable number.

20707968 is an abundant number, since it is smaller than the sum of its proper divisors (34298592).

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

20707968 is an equidigital number, since it uses as much as digits as its factorization.

20707968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53944 (or 53932 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 20707968 is about 4550.6008394497. The cubic root of 20707968 is about 274.6075636595.

The spelling of 20707968 in words is "twenty million, seven hundred seven thousand, nine hundred sixty-eight".