18410418 has 48 divisors (see below), whose sum is σ = 44455320. Its totient is φ = 5467392.

The previous prime is 18410393. The next prime is 18410429. The reversal of 18410418 is 81401481.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 1046529 = 4167^2 + 1023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18410391 and 18410400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5430 + ... + 8142.

Almost surely, 2^18410418 is an apocalyptic number.

18410418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18410418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22227660).

18410418 is an abundant number, since it is smaller than the sum of its proper divisors (26044902).

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

18410418 is a wasteful number, since it uses less digits than its factorization.

18410418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18410418 is about 4290.7363004501. The cubic root of 18410418 is about 264.0510404070.

Adding to 18410418 its reverse (81401481), we get a palindrome (99811899).

It can be divided in two parts, 18 and 410418, that multiplied together give a square (7387524 = 2718²).

The spelling of 18410418 in words is "eighteen million, four hundred ten thousand, four hundred eighteen".