18386722170 has 160 divisors (see below), whose sum is σ = 52224606720. Its totient is φ = 4634340480.

The previous prime is 18386722153. The next prime is 18386722171. The reversal of 18386722170 is 7122768381.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18386722171) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1071216 + ... + 1088244.

It is an arithmetic number, because the mean of its divisors is an integer number (326403792).

Almost surely, 2^18386722170 is an apocalyptic number.

18386722170 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 18386722170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26112303360).

18386722170 is an abundant number, since it is smaller than the sum of its proper divisors (33837884550).

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

18386722170 is a wasteful number, since it uses less digits than its factorization.

18386722170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17122 (or 17113 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 18386722170 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, one hundred seventy".