18386278050 has 96 divisors (see below), whose sum is σ = 52590384000. Its totient is φ = 4163996160.

The previous prime is 18386278037. The next prime is 18386278091. The reversal of 18386278050 is 5087268381.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34126 + ... + 194774.

It is an arithmetic number, because the mean of its divisors is an integer number (547816500).

Almost surely, 2^18386278050 is an apocalyptic number.

18386278050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18386278050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26295192000).

18386278050 is an abundant number, since it is smaller than the sum of its proper divisors (34204105950).

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

18386278050 is a wasteful number, since it uses less digits than its factorization.

18386278050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160780 (or 160775 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18386278050 in words is "eighteen billion, three hundred eighty-six million, two hundred seventy-eight thousand, fifty".