18863638248 has 128 divisors (see below), whose sum is σ = 58334976000. Its totient is φ = 4949911296.

The previous prime is 18863638247. The next prime is 18863638279. The reversal of 18863638248 is 84283636881.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18863638247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412915 + ... + 456317.

It is an arithmetic number, because the mean of its divisors is an integer number (455742000).

Almost surely, 2^18863638248 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 18863638248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29167488000).

18863638248 is an abundant number, since it is smaller than the sum of its proper divisors (39471337752).

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

18863638248 is a wasteful number, since it uses less digits than its factorization.

18863638248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43631 (or 43627 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 57.

The spelling of 18863638248 in words is "eighteen billion, eight hundred sixty-three million, six hundred thirty-eight thousand, two hundred forty-eight".