18189143532 has 36 divisors (see below), whose sum is σ = 52546415376. Its totient is φ = 5196898080.

The previous prime is 18189143503. The next prime is 18189143543. The reversal of 18189143532 is 23534198181.

18189143532 is a `hidden beast` number, since 1 + 8 + 189 + 1 + 435 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36089319 + ... + 36089822.

Almost surely, 2^18189143532 is an apocalyptic number.

18189143532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18189143532 is an abundant number, since it is smaller than the sum of its proper divisors (34357271844).

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

18189143532 is a wasteful number, since it uses less digits than its factorization.

18189143532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72179158 (or 72179153 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 18189143532 in words is "eighteen billion, one hundred eighty-nine million, one hundred forty-three thousand, five hundred thirty-two".