20541530578 has 8 divisors (see below), whose sum is σ = 30814597872. Its totient is φ = 10269997956.

The previous prime is 20541530573. The next prime is 20541530579. The reversal of 20541530578 is 87503514502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20541530578.

It is not an unprimeable number, because it can be changed into a prime (20541530573) by changing a digit.

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, 349600 + ... + 404107.

It is an arithmetic number, because the mean of its divisors is an integer number (3851824734).

Almost surely, 2^20541530578 is an apocalyptic number.

20541530578 is a deficient number, since it is larger than the sum of its proper divisors (10273067294).

20541530578 is a wasteful number, since it uses less digits than its factorization.

20541530578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767336.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 20541530578 in words is "twenty billion, five hundred forty-one million, five hundred thirty thousand, five hundred seventy-eight".