18488418 has 64 divisors (see below), whose sum is σ = 42964992. Its totient is φ = 5253120.

The previous prime is 18488413. The next prime is 18488441. The reversal of 18488418 is 81488481.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18488418.

It is not an unprimeable number, because it can be changed into a prime (18488413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96703 + ... + 96893.

It is an arithmetic number, because the mean of its divisors is an integer number (671328).

Almost surely, 2^18488418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18488418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21482496).

18488418 is an abundant number, since it is smaller than the sum of its proper divisors (24476574).

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

18488418 is a wasteful number, since it uses less digits than its factorization.

18488418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its digits is 65536, while the sum is 42.

The square root of 18488418 is about 4299.8160425767. The cubic root of 18488418 is about 264.4234194747.

The spelling of 18488418 in words is "eighteen million, four hundred eighty-eight thousand, four hundred eighteen".