18523755115811 has 8 divisors (see below), whose sum is σ = 20208071138304. Its totient is φ = 16839495474120.

The previous prime is 18523755115793. The next prime is 18523755115819. The reversal of 18523755115811 is 11851155732581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18523755115811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18523755115819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13406771 + ... + 14723756.

It is an arithmetic number, because the mean of its divisors is an integer number (2526008892288).

Almost surely, 2^{18523755115811} is an apocalyptic number.

18523755115811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18523755115811 is a deficient number, since it is larger than the sum of its proper divisors (1684316022493).

18523755115811 is a wasteful number, since it uses less digits than its factorization.

18523755115811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28190401.

The product of its digits is 1680000, while the sum is 53.

The spelling of 18523755115811 in words is "eighteen trillion, five hundred twenty-three billion, seven hundred fifty-five million, one hundred fifteen thousand, eight hundred eleven".