20730536 has 16 divisors (see below), whose sum is σ = 38923200. Its totient is φ = 10351024.

The previous prime is 20730533. The next prime is 20730551. The reversal of 20730536 is 63503702.

It is not an unprimeable number, because it can be changed into a prime (20730533) 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, 6881 + ... + 9423.

It is an arithmetic number, because the mean of its divisors is an integer number (2432700).

Almost surely, 2^20730536 is an apocalyptic number.

It is an amenable number.

20730536 is a deficient number, since it is larger than the sum of its proper divisors (18192664).

20730536 is a wasteful number, since it uses less digits than its factorization.

20730536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568 (or 3564 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 20730536 is about 4553.0798367698. The cubic root of 20730536 is about 274.7072852341.

The spelling of 20730536 in words is "twenty million, seven hundred thirty thousand, five hundred thirty-six".