18117458070911 has 4 divisors (see below), whose sum is σ = 18117846895824. Its totient is φ = 18117069246000.

The previous prime is 18117458070863. The next prime is 18117458070937. The reversal of 18117458070911 is 11907085471181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18117458070911 - 2²² = 18117453876607 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 (18117458070011) 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, 194342555 + ... + 194435756.

It is an arithmetic number, because the mean of its divisors is an integer number (4529461723956).

Almost surely, 2^{18117458070911} is an apocalyptic number.

18117458070911 is a deficient number, since it is larger than the sum of its proper divisors (388824913).

18117458070911 is an equidigital number, since it uses as much as digits as its factorization.

18117458070911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388824912.

The product of its (nonzero) digits is 564480, while the sum is 53.

The spelling of 18117458070911 in words is "eighteen trillion, one hundred seventeen billion, four hundred fifty-eight million, seventy thousand, nine hundred eleven".