18143281152 has 128 divisors (see below), whose sum is σ = 53759671200. Its totient is φ = 6047465472.

The previous prime is 18143281151. The next prime is 18143281157. The reversal of 18143281152 is 25118234181.

It is a happy number.

18143281152 is a `hidden beast` number, since 181 + 4 + 328 + 1 + 152 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is not an unprimeable number, because it can be changed into a prime (18143281151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874483 + ... + 894989.

Almost surely, 2^18143281152 is an apocalyptic number.

18143281152 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 18143281152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26879835600).

18143281152 is an abundant number, since it is smaller than the sum of its proper divisors (35616390048).

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

18143281152 is an frugal number, since it uses more digits than its factorization.

18143281152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20546 (or 20512 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The spelling of 18143281152 in words is "eighteen billion, one hundred forty-three million, two hundred eighty-one thousand, one hundred fifty-two".