18281324232 has 48 divisors (see below), whose sum is σ = 51664616640. Its totient is φ = 5828827488.

The previous prime is 18281324177. The next prime is 18281324263. The reversal of 18281324232 is 23242318281.

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

It is a nude number because it is divisible by every one of its digits.

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, 5518068 + ... + 5521379.

It is an arithmetic number, because the mean of its divisors is an integer number (1076346180).

Almost surely, 2^18281324232 is an apocalyptic number.

18281324232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18281324232 is an abundant number, since it is smaller than the sum of its proper divisors (33383292408).

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

18281324232 is a wasteful number, since it uses less digits than its factorization.

18281324232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039482 (or 11039475 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The spelling of 18281324232 in words is "eighteen billion, two hundred eighty-one million, three hundred twenty-four thousand, two hundred thirty-two".