18535351686861 has 8 divisors (see below), whose sum is σ = 24758982877024. Its totient is φ = 12334310810640.

The previous prime is 18535351686857. The next prime is 18535351686871. The reversal of 18535351686861 is 16868615353581.

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

It is not a de Polignac number, because 18535351686861 - 2² = 18535351686857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18535351686792 and 18535351686801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18535351686821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5647576570 + ... + 5647579851.

It is an arithmetic number, because the mean of its divisors is an integer number (3094872859628).

Almost surely, 2^{18535351686861} is an apocalyptic number.

It is an amenable number.

18535351686861 is a deficient number, since it is larger than the sum of its proper divisors (6223631190163).

18535351686861 is a wasteful number, since it uses less digits than its factorization.

18535351686861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11295156971.

The product of its digits is 124416000, while the sum is 66.

The spelling of 18535351686861 in words is "eighteen trillion, five hundred thirty-five billion, three hundred fifty-one million, six hundred eighty-six thousand, eight hundred sixty-one".