13820804285 has 4 divisors (see below), whose sum is σ = 16584965148. Its totient is φ = 11056643424.

The previous prime is 13820804243. The next prime is 13820804297. The reversal of 13820804285 is 58240802831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10304077081 + 3516727204 = 101509^2 + 59302^2 .

It is a cyclic number.

It is not a de Polignac number, because 13820804285 - 2²⁰ = 13819755709 is a prime.

It is a super-2 number, since 2×13820804285² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382080424 + ... + 1382080433.

It is an arithmetic number, because the mean of its divisors is an integer number (4146241287).

Almost surely, 2^13820804285 is an apocalyptic number.

It is an amenable number.

13820804285 is a deficient number, since it is larger than the sum of its proper divisors (2764160863).

13820804285 is an equidigital number, since it uses as much as digits as its factorization.

13820804285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764160862.

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 13820804285 in words is "thirteen billion, eight hundred twenty million, eight hundred four thousand, two hundred eighty-five".