18631106854373 has 8 divisors (see below), whose sum is σ = 20064656457216. Its totient is φ = 17197612614000.

The previous prime is 18631106854363. The next prime is 18631106854387. The reversal of 18631106854373 is 37345860113681.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-18631106854373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18631106854333) 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, 13140353 + ... + 14488998.

It is an arithmetic number, because the mean of its divisors is an integer number (2508082057152).

Almost surely, 2^{18631106854373} is an apocalyptic number.

18631106854373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18631106854373 is a deficient number, since it is larger than the sum of its proper divisors (1433549602843).

18631106854373 is a wasteful number, since it uses less digits than its factorization.

18631106854373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27681235.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 18631106854373 in words is "eighteen trillion, six hundred thirty-one billion, one hundred six million, eight hundred fifty-four thousand, three hundred seventy-three".