11918834338905 has 48 divisors (see below), whose sum is σ = 22285144627200. Its totient is φ = 5858066876544.

The previous prime is 11918834338889. The next prime is 11918834338907. The reversal of 11918834338905 is 50983343881911.

11918834338905 is a `hidden beast` number, since 1 + 1 + 9 + 188 + 34 + 338 + 90 + 5 = 666.

It is not a de Polignac number, because 11918834338905 - 2⁴ = 11918834338889 is a prime.

It is a super-2 number, since 2×11918834338905² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11918834338907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16427505 + ... + 17137694.

It is an arithmetic number, because the mean of its divisors is an integer number (464273846400).

Almost surely, 2^{11918834338905} is an apocalyptic number.

11918834338905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11918834338905 is a deficient number, since it is larger than the sum of its proper divisors (10366310288295).

11918834338905 is a wasteful number, since it uses less digits than its factorization.

11918834338905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33565830 (or 33565827 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 11918834338905 in words is "eleven trillion, nine hundred eighteen billion, eight hundred thirty-four million, three hundred thirty-eight thousand, nine hundred five".