18217231332 has 24 divisors (see below), whose sum is σ = 42526898400. Its totient is φ = 6069549696.

The previous prime is 18217231303. The next prime is 18217231363. The reversal of 18217231332 is 23313271281.

It is a junction number, because it is equal to n+sod(n) for n = 18217231293 and 18217231302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330982 + ... + 382077.

It is an arithmetic number, because the mean of its divisors is an integer number (1771954100).

Almost surely, 2^18217231332 is an apocalyptic number.

18217231332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18217231332 is an abundant number, since it is smaller than the sum of its proper divisors (24309667068).

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

18217231332 is a wasteful number, since it uses less digits than its factorization.

18217231332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715195 (or 715193 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The spelling of 18217231332 in words is "eighteen billion, two hundred seventeen million, two hundred thirty-one thousand, three hundred thirty-two".