18418764 has 96 divisors (see below), whose sum is σ = 53738496. Its totient is φ = 4780800.

The previous prime is 18418759. The next prime is 18418787. The reversal of 18418764 is 46781481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110209 + ... + 110375.

It is an arithmetic number, because the mean of its divisors is an integer number (559776).

Almost surely, 2^18418764 is an apocalyptic number.

18418764 is a gapful number since it is divisible by the number (14) 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 18418764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26869248).

18418764 is an abundant number, since it is smaller than the sum of its proper divisors (35319732).

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

18418764 is a wasteful number, since it uses less digits than its factorization.

18418764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 293 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 18418764 is about 4291.7087506027. The cubic root of 18418764 is about 264.0909351567.

The spelling of 18418764 in words is "eighteen million, four hundred eighteen thousand, seven hundred sixty-four".