20562730 has 16 divisors (see below), whose sum is σ = 37916424. Its totient is φ = 8024320.

The previous prime is 20562721. The next prime is 20562733. The reversal of 20562730 is 3726502.

It can be written as a sum of positive squares in 4 ways, for example, as 11363641 + 9199089 = 3371^2 + 3033^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20562695 and 20562704.

It is not an unprimeable number, because it can be changed into a prime (20562733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24667 + ... + 25486.

Almost surely, 2^20562730 is an apocalyptic number.

20562730 is a deficient number, since it is larger than the sum of its proper divisors (17353694).

20562730 is a wasteful number, since it uses less digits than its factorization.

20562730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50201.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20562730 is about 4534.6146473543. The cubic root of 20562730 is about 273.9640583683.

The spelling of 20562730 in words is "twenty million, five hundred sixty-two thousand, seven hundred thirty".