18164842320 has 80 divisors (see below), whose sum is σ = 56491152192. Its totient is φ = 4828462080.

The previous prime is 18164842313. The next prime is 18164842349. The reversal of 18164842320 is 2324846181.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×18164842320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 45786 + ... + 196025.

Almost surely, 2^18164842320 is an apocalyptic number.

18164842320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18164842320 is an abundant number, since it is smaller than the sum of its proper divisors (38326309872).

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

18164842320 is a wasteful number, since it uses less digits than its factorization.

18164842320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242140 (or 242134 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 18164842320 in words is "eighteen billion, one hundred sixty-four million, eight hundred forty-two thousand, three hundred twenty".