18419173120 has 72 divisors (see below), whose sum is σ = 44724281616. Its totient is φ = 7266705408.

The previous prime is 18419173117. The next prime is 18419173121. The reversal of 18419173120 is 2137191481.

It is a self number, because there is not a number n which added to its sum of digits gives 18419173120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18419173121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5122 + ... + 192001.

It is an arithmetic number, because the mean of its divisors is an integer number (621170578).

Almost surely, 2^18419173120 is an apocalyptic number.

18419173120 is a gapful number since it is divisible by the number (10) 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 18419173120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22362140808).

18419173120 is an abundant number, since it is smaller than the sum of its proper divisors (26305108496).

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

18419173120 is an equidigital number, since it uses as much as digits as its factorization.

18419173120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197217 (or 197203 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 18419173120 in words is "eighteen billion, four hundred nineteen million, one hundred seventy-three thousand, one hundred twenty".