18105136 has 80 divisors (see below), whose sum is σ = 43765056. Its totient is φ = 7077888.

The previous prime is 18105121. The next prime is 18105151. The reversal of 18105136 is 63150181.

It is an interprime number because it is at equal distance from previous prime (18105121) and next prime (18105151).

It is a self number, because there is not a number n which added to its sum of digits gives 18105136.

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, 70320 + ... + 70576.

Almost surely, 2^18105136 is an apocalyptic number.

18105136 is a gapful number since it is divisible by the number (16) 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 18105136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21882528).

18105136 is an abundant number, since it is smaller than the sum of its proper divisors (25659920).

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

18105136 is a wasteful number, since it uses less digits than its factorization.

18105136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 18105136 is about 4255.0130434583. The cubic root of 18105136 is about 262.5833978398.

The spelling of 18105136 in words is "eighteen million, one hundred five thousand, one hundred thirty-six".