18363638196 has 96 divisors (see below), whose sum is σ = 49829095680. Its totient is φ = 5837432832.

The previous prime is 18363638171. The next prime is 18363638203. The reversal of 18363638196 is 69183636381.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826140 + ... + 848076.

It is an arithmetic number, because the mean of its divisors is an integer number (519053080).

Almost surely, 2^18363638196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18363638196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24914547840).

18363638196 is an abundant number, since it is smaller than the sum of its proper divisors (31465457484).

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

18363638196 is a wasteful number, since it uses less digits than its factorization.

18363638196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22310 (or 22302 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 18363638196 in words is "eighteen billion, three hundred sixty-three million, six hundred thirty-eight thousand, one hundred ninety-six".