18955136 has 64 divisors (see below), whose sum is σ = 41420160. Its totient is φ = 8601600.

The previous prime is 18955127. The next prime is 18955163. The reversal of 18955136 is 63155981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 18955136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67316 + ... + 67596.

It is an arithmetic number, because the mean of its divisors is an integer number (647190).

Almost surely, 2^18955136 is an apocalyptic number.

18955136 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 18955136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20710080).

18955136 is an abundant number, since it is smaller than the sum of its proper divisors (22465024).

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

18955136 is a wasteful number, since it uses less digits than its factorization.

18955136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 331 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 18955136 is about 4353.7496482917. The cubic root of 18955136 is about 266.6299727288.

It can be divided in two parts, 18955 and 136, that added together give a palindrome (19091).

The spelling of 18955136 in words is "eighteen million, nine hundred fifty-five thousand, one hundred thirty-six".