18814838645705 has 4 divisors (see below), whose sum is σ = 22577806374852. Its totient is φ = 15051870916560.

The previous prime is 18814838645653. The next prime is 18814838645747. The reversal of 18814838645705 is 50754683841881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11343477888064 + 7471360757641 = 3368008^2 + 2733379^2 .

It is not a de Polignac number, because 18814838645705 - 2¹² = 18814838641609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1881483864566 + ... + 1881483864575.

It is an arithmetic number, because the mean of its divisors is an integer number (5644451593713).

Almost surely, 2^{18814838645705} is an apocalyptic number.

It is an amenable number.

18814838645705 is a deficient number, since it is larger than the sum of its proper divisors (3762967729147).

18814838645705 is an equidigital number, since it uses as much as digits as its factorization.

18814838645705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762967729146.

The product of its (nonzero) digits is 206438400, while the sum is 68.

The spelling of 18814838645705 in words is "eighteen trillion, eight hundred fourteen billion, eight hundred thirty-eight million, six hundred forty-five thousand, seven hundred five".