2018683503685 has 4 divisors (see below), whose sum is σ = 2422420204428. Its totient is φ = 1614946802944.

The previous prime is 2018683503673. The next prime is 2018683503689. The reversal of 2018683503685 is 5863053868102.

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 703721332161 + 1314962171524 = 838881^2 + 1146718^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018683503685 - 2²³ = 2018675115077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018683503689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201868350364 + ... + 201868350373.

It is an arithmetic number, because the mean of its divisors is an integer number (605605051107).

Almost surely, 2^{2018683503685} is an apocalyptic number.

It is an amenable number.

2018683503685 is a deficient number, since it is larger than the sum of its proper divisors (403736700743).

2018683503685 is an equidigital number, since it uses as much as digits as its factorization.

2018683503685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403736700742.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 2018683503685 in words is "two trillion, eighteen billion, six hundred eighty-three million, five hundred three thousand, six hundred eighty-five".