20456564530 has 8 divisors (see below), whose sum is σ = 36821816172. Its totient is φ = 8182625808.

The previous prime is 20456564521. The next prime is 20456564561. The reversal of 20456564530 is 3546565402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19954670121 + 501894409 = 141261^2 + 22403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022828217 + ... + 1022828236.

Almost surely, 2^20456564530 is an apocalyptic number.

20456564530 is a deficient number, since it is larger than the sum of its proper divisors (16365251642).

20456564530 is a wasteful number, since it uses less digits than its factorization.

20456564530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045656460.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 20456564530 in words is "twenty billion, four hundred fifty-six million, five hundred sixty-four thousand, five hundred thirty".