2081186613 has 24 divisors (see below), whose sum is σ = 3282764160. Its totient is φ = 1260048960.

The previous prime is 2081186573. The next prime is 2081186617. The reversal of 2081186613 is 3166811802.

2081186613 is a `hidden beast` number, since 20 + 8 + 1 + 18 + 6 + 613 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2081186613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081186617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92745 + ... + 112977.

It is an arithmetic number, because the mean of its divisors is an integer number (136781840).

Almost surely, 2^2081186613 is an apocalyptic number.

It is an amenable number.

2081186613 is a deficient number, since it is larger than the sum of its proper divisors (1201577547).

2081186613 is a wasteful number, since it uses less digits than its factorization.

2081186613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21289 (or 21286 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2081186613 is about 45620.0242547064. The cubic root of 2081186613 is about 1276.7435560163.

The spelling of 2081186613 in words is "two billion, eighty-one million, one hundred eighty-six thousand, six hundred thirteen".