20566310578 has 16 divisors (see below), whose sum is σ = 33715507104. Its totient is φ = 9331227360.

The previous prime is 20566310561. The next prime is 20566310587. The reversal of 20566310578 is 87501366502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842475 + ... + 866542.

It is an arithmetic number, because the mean of its divisors is an integer number (2107219194).

Almost surely, 2^20566310578 is an apocalyptic number.

20566310578 is a deficient number, since it is larger than the sum of its proper divisors (13149196526).

20566310578 is a wasteful number, since it uses less digits than its factorization.

20566310578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709577.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 20566310578 in words is "twenty billion, five hundred sixty-six million, three hundred ten thousand, five hundred seventy-eight".