18634287431861 has 8 divisors (see below), whose sum is σ = 18679568570400. Its totient is φ = 18589059225360.

The previous prime is 18634287431839. The next prime is 18634287431867. The reversal of 18634287431861 is 16813478243681.

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

It is a cyclic number.

It is not a de Polignac number, because 18634287431861 - 2¹⁸ = 18634287169717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18634287431794 and 18634287431803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18634287431867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12528026 + ... + 13936283.

It is an arithmetic number, because the mean of its divisors is an integer number (2334946071300).

Almost surely, 2^{18634287431861} is an apocalyptic number.

It is an amenable number.

18634287431861 is a deficient number, since it is larger than the sum of its proper divisors (45281138539).

18634287431861 is a wasteful number, since it uses less digits than its factorization.

18634287431861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26466019.

The product of its digits is 37158912, while the sum is 62.

The spelling of 18634287431861 in words is "eighteen trillion, six hundred thirty-four billion, two hundred eighty-seven million, four hundred thirty-one thousand, eight hundred sixty-one".