18814735779839 has 4 divisors (see below), whose sum is σ = 18831949628856. Its totient is φ = 18797521930824.

The previous prime is 18814735779769. The next prime is 18814735779863. The reversal of 18814735779839 is 93897753741881.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18814735779839 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 (18814735779239) 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, 8606922869 + ... + 8606925054.

It is an arithmetic number, because the mean of its divisors is an integer number (4707987407214).

Almost surely, 2^{18814735779839} is an apocalyptic number.

18814735779839 is a deficient number, since it is larger than the sum of its proper divisors (17213849017).

18814735779839 is a wasteful number, since it uses less digits than its factorization.

18814735779839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17213849016.

The product of its digits is 2560481280, while the sum is 80.

The spelling of 18814735779839 in words is "eighteen trillion, eight hundred fourteen billion, seven hundred thirty-five million, seven hundred seventy-nine thousand, eight hundred thirty-nine".