18378889848 has 256 divisors, whose sum is σ = 58821120000. Its totient is φ = 5258597760.

The previous prime is 18378889817. The next prime is 18378889877. The reversal of 18378889848 is 84898887381.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19998333 + ... + 19999251.

It is an arithmetic number, because the mean of its divisors is an integer number (229770000).

Almost surely, 2^18378889848 is an apocalyptic number.

18378889848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18378889848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29410560000).

18378889848 is an abundant number, since it is smaller than the sum of its proper divisors (40442230152).

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

18378889848 is a wasteful number, since it uses less digits than its factorization.

18378889848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1397 counting only the distinct ones).

The product of its digits is 198180864, while the sum is 72.

The spelling of 18378889848 in words is "eighteen billion, three hundred seventy-eight million, eight hundred eighty-nine thousand, eight hundred forty-eight".