20756168 has 16 divisors (see below), whose sum is σ = 39867660. Its totient is φ = 10124800.

The previous prime is 20756159. The next prime is 20756173. The reversal of 20756168 is 86165702.

It can be written as a sum of positive squares in 2 ways, for example, as 16337764 + 4418404 = 4042^2 + 2102^2 .

It is an unprimeable number.

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, 31313 + ... + 31968.

Almost surely, 2^20756168 is an apocalyptic number.

It is an amenable number.

20756168 is a deficient number, since it is larger than the sum of its proper divisors (19111492).

20756168 is a wasteful number, since it uses less digits than its factorization.

20756168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63328 (or 63324 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20756168 is about 4555.8937652232. The cubic root of 20756168 is about 274.8204580128.

The spelling of 20756168 in words is "twenty million, seven hundred fifty-six thousand, one hundred sixty-eight".