20566011650 has 12 divisors (see below), whose sum is σ = 38252781762. Its totient is φ = 8226404640.

The previous prime is 20566011629. The next prime is 20566011691. The reversal of 20566011650 is 5611066502.

It can be written as a sum of positive squares in 3 ways, for example, as 15762551401 + 4803460249 = 125549^2 + 69307^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205660067 + ... + 205660166.

Almost surely, 2^20566011650 is an apocalyptic number.

20566011650 is a deficient number, since it is larger than the sum of its proper divisors (17686770112).

20566011650 is a wasteful number, since it uses less digits than its factorization.

20566011650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411320245 (or 411320240 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 20566011650 in words is "twenty billion, five hundred sixty-six million, eleven thousand, six hundred fifty".