20507768 has 32 divisors (see below), whose sum is σ = 40036800. Its totient is φ = 9839232.

The previous prime is 20507761. The next prime is 20507777. The reversal of 20507768 is 86770502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507761) 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 7 ways as a sum of consecutive naturals, for example, 22946 + ... + 23822.

It is an arithmetic number, because the mean of its divisors is an integer number (1251150).

Almost surely, 2^20507768 is an apocalyptic number.

It is an amenable number.

20507768 is a deficient number, since it is larger than the sum of its proper divisors (19529032).

20507768 is a wasteful number, since it uses less digits than its factorization.

20507768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 20507768 is about 4528.5503199148. The cubic root of 20507768 is about 273.7197482608.

The spelling of 20507768 in words is "twenty million, five hundred seven thousand, seven hundred sixty-eight".