20354440506266 has 16 divisors (see below), whose sum is σ = 30567789904704. Its totient is φ = 10165178376864.

The previous prime is 20354440506247. The next prime is 20354440506289. The reversal of 20354440506266 is 66260504445302.

It is a self number, because there is not a number n which added to its sum of digits gives 20354440506266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35756366 + ... + 36321158.

It is an arithmetic number, because the mean of its divisors is an integer number (1910486869044).

Almost surely, 2^{20354440506266} is an apocalyptic number.

20354440506266 is a deficient number, since it is larger than the sum of its proper divisors (10213349398438).

20354440506266 is a wasteful number, since it uses less digits than its factorization.

20354440506266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586085.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 20354440506266 in words is "twenty trillion, three hundred fifty-four billion, four hundred forty million, five hundred six thousand, two hundred sixty-six".