18434180 has 48 divisors (see below), whose sum is σ = 41160000. Its totient is φ = 6915456.

The previous prime is 18434153. The next prime is 18434203. The reversal of 18434180 is 8143481.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52646 + ... + 52994.

It is an arithmetic number, because the mean of its divisors is an integer number (857500).

Almost surely, 2^18434180 is an apocalyptic number.

18434180 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 18434180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20580000).

18434180 is an abundant number, since it is smaller than the sum of its proper divisors (22725820).

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

18434180 is a wasteful number, since it uses less digits than its factorization.

18434180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18434180 is about 4293.5043961780. The cubic root of 18434180 is about 264.1645935656.

The spelling of 18434180 in words is "eighteen million, four hundred thirty-four thousand, one hundred eighty".