20800466605 has 16 divisors (see below), whose sum is σ = 25211257344. Its totient is φ = 16474069440.

The previous prime is 20800466591. The next prime is 20800466629. The reversal of 20800466605 is 50666400802.

It is not a de Polignac number, because 20800466605 - 2¹¹ = 20800464557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150282 + ... + 253348.

It is an arithmetic number, because the mean of its divisors is an integer number (1575703584).

Almost surely, 2^20800466605 is an apocalyptic number.

It is an amenable number.

20800466605 is a deficient number, since it is larger than the sum of its proper divisors (4410790739).

20800466605 is a wasteful number, since it uses less digits than its factorization.

20800466605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103476.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 20800466605 in words is "twenty billion, eight hundred million, four hundred sixty-six thousand, six hundred five".