18845136 has 120 divisors (see below), whose sum is σ = 56600544. Its totient is φ = 6065280.

The previous prime is 18845111. The next prime is 18845147. The reversal of 18845136 is 63154881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18845136.

It is a congruent number.

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, 143791 + ... + 143921.

Almost surely, 2^18845136 is an apocalyptic number.

18845136 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 18845136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28300272).

18845136 is an abundant number, since it is smaller than the sum of its proper divisors (37755408).

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

18845136 is a wasteful number, since it uses less digits than its factorization.

18845136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 173 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 18845136 is about 4341.0984784960. The cubic root of 18845136 is about 266.1132048726.

It can be divided in two parts, 18845 and 136, that added together give a palindrome (18981).

The spelling of 18845136 in words is "eighteen million, eight hundred forty-five thousand, one hundred thirty-six".