20566206492 has 24 divisors (see below), whose sum is σ = 51679185936. Its totient is φ = 6328063488.

The previous prime is 20566206481. The next prime is 20566206517. The reversal of 20566206492 is 29460266502.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 65917173 + ... + 65917484.

It is an arithmetic number, because the mean of its divisors is an integer number (2153299414).

Almost surely, 2^20566206492 is an apocalyptic number.

It is an amenable number.

20566206492 is an abundant number, since it is smaller than the sum of its proper divisors (31112979444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20566206492 is a wasteful number, since it uses less digits than its factorization.

20566206492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131834677 (or 131834675 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 20566206492 in words is "twenty billion, five hundred sixty-six million, two hundred six thousand, four hundred ninety-two".