18181152 has 96 divisors (see below), whose sum is σ = 57879360. Its totient is φ = 5506560.

The previous prime is 18181147. The next prime is 18181181. The reversal of 18181152 is 25118181.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 8548 + ... + 10460.

It is an arithmetic number, because the mean of its divisors is an integer number (602910).

Almost surely, 2^18181152 is an apocalyptic number.

18181152 is a gapful number since it is divisible by the number (12) 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 18181152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28939680).

18181152 is an abundant number, since it is smaller than the sum of its proper divisors (39698208).

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

18181152 is a wasteful number, since it uses less digits than its factorization.

18181152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1929 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 18181152 is about 4263.9362096542. The cubic root of 18181152 is about 262.9503778539.

18181152 divided by its sum of digits (27) gives a palindrome (673376).

The spelling of 18181152 in words is "eighteen million, one hundred eighty-one thousand, one hundred fifty-two".