18682779679817 has 32 divisors (see below), whose sum is σ = 20756066572800. Its totient is φ = 16674667776000.

The previous prime is 18682779679793. The next prime is 18682779679873. The reversal of 18682779679817 is 71897697728681.

It is not a de Polignac number, because 18682779679817 - 2⁴⁴ = 1090593635401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18682779679117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110380109 + ... + 110549237.

It is an arithmetic number, because the mean of its divisors is an integer number (648627080400).

Almost surely, 2^{18682779679817} is an apocalyptic number.

It is an amenable number.

18682779679817 is a deficient number, since it is larger than the sum of its proper divisors (2073286892983).

18682779679817 is a wasteful number, since it uses less digits than its factorization.

18682779679817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169937.

The product of its digits is 7169347584, while the sum is 86.

The spelling of 18682779679817 in words is "eighteen trillion, six hundred eighty-two billion, seven hundred seventy-nine million, six hundred seventy-nine thousand, eight hundred seventeen".