13205083785 has 32 divisors (see below), whose sum is σ = 21419596800. Its totient is φ = 6945851328.

The previous prime is 13205083783. The next prime is 13205083813. The reversal of 13205083785 is 58738050231.

It is not a de Polignac number, because 13205083785 - 2¹ = 13205083783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13205083781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 736902 + ... + 754608.

It is an arithmetic number, because the mean of its divisors is an integer number (669362400).

Almost surely, 2^13205083785 is an apocalyptic number.

13205083785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13205083785 is a deficient number, since it is larger than the sum of its proper divisors (8214513015).

13205083785 is a wasteful number, since it uses less digits than its factorization.

13205083785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18397.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 13205083785 in words is "thirteen billion, two hundred five million, eighty-three thousand, seven hundred eighty-five".