18634287431859 has 96 divisors (see below), whose sum is σ = 29019196857600. Its totient is φ = 10541187820800.

The previous prime is 18634287431839. The next prime is 18634287431867. The reversal of 18634287431859 is 95813478243681.

It is not a de Polignac number, because 18634287431859 - 2⁷ = 18634287431731 is a prime.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18634287431793 and 18634287431802.

It is not an unprimeable number, because it can be changed into a prime (18634287431839) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 99072597 + ... + 99260505.

It is an arithmetic number, because the mean of its divisors is an integer number (302283300600).

Almost surely, 2^{18634287431859} is an apocalyptic number.

18634287431859 is a deficient number, since it is larger than the sum of its proper divisors (10384909425741).

18634287431859 is a wasteful number, since it uses less digits than its factorization.

18634287431859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188097 (or 188066 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 69.

The spelling of 18634287431859 in words is "eighteen trillion, six hundred thirty-four billion, two hundred eighty-seven million, four hundred thirty-one thousand, eight hundred fifty-nine".