20800541705 has 8 divisors (see below), whose sum is σ = 24967618632. Its totient is φ = 16635787648.

The previous prime is 20800541681. The next prime is 20800541719. The reversal of 20800541705 is 50714500802.

It can be written as a sum of positive squares in 4 ways, for example, as 102252544 + 20698289161 = 10112^2 + 143869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20800541705 - 2²⁴ = 20783764489 is a prime.

It is a Duffinian 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, 560954 + ... + 596883.

It is an arithmetic number, because the mean of its divisors is an integer number (3120952329).

Almost surely, 2^20800541705 is an apocalyptic number.

It is an amenable number.

20800541705 is a deficient number, since it is larger than the sum of its proper divisors (4167076927).

20800541705 is a wasteful number, since it uses less digits than its factorization.

20800541705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161435.

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 20800541705 in words is "twenty billion, eight hundred million, five hundred forty-one thousand, seven hundred five".