20730568 has 16 divisors (see below), whose sum is σ = 40124160. Its totient is φ = 10030800.

The previous prime is 20730551. The next prime is 20730569. The reversal of 20730568 is 86503702.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (20730569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41548 + ... + 42043.

It is an arithmetic number, because the mean of its divisors is an integer number (2507760).

Almost surely, 2^20730568 is an apocalyptic number.

It is an amenable number.

20730568 is a deficient number, since it is larger than the sum of its proper divisors (19393592).

20730568 is a wasteful number, since it uses less digits than its factorization.

20730568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83628 (or 83624 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20730568 is about 4553.0833508733. The cubic root of 20730568 is about 274.7074265816.

The spelling of 20730568 in words is "twenty million, seven hundred thirty thousand, five hundred sixty-eight".