18698113386 has 80 divisors (see below), whose sum is σ = 43162035840. Its totient is φ = 6046332480.

The previous prime is 18698113381. The next prime is 18698113387. The reversal of 18698113386 is 68331189681.

18698113386 is a `hidden beast` number, since 186 + 9 + 81 + 1 + 3 + 386 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18698113381) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1181055 + ... + 1196781.

It is an arithmetic number, because the mean of its divisors is an integer number (539525448).

Almost surely, 2^18698113386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18698113386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21581017920).

18698113386 is an abundant number, since it is smaller than the sum of its proper divisors (24463922454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18698113386 is a wasteful number, since it uses less digits than its factorization.

18698113386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15961 (or 15952 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 18698113386 in words is "eighteen billion, six hundred ninety-eight million, one hundred thirteen thousand, three hundred eighty-six".