2081853811918 has 16 divisors (see below), whose sum is σ = 3271627759104. Its totient is φ = 992313562680.

The previous prime is 2081853811903. The next prime is 2081853811927. The reversal of 2081853811918 is 8191183581802.

It is a happy number.

It is a super-3 number, since 3×2081853811918³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250580080 + ... + 250588387.

It is an arithmetic number, because the mean of its divisors is an integer number (204476734944).

Almost surely, 2^{2081853811918} is an apocalyptic number.

2081853811918 is a deficient number, since it is larger than the sum of its proper divisors (1189773947186).

2081853811918 is a wasteful number, since it uses less digits than its factorization.

2081853811918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501168567.

The product of its (nonzero) digits is 1105920, while the sum is 55.

The spelling of 2081853811918 in words is "two trillion, eighty-one billion, eight hundred fifty-three million, eight hundred eleven thousand, nine hundred eighteen".