18051344320 has 56 divisors (see below), whose sum is σ = 43000263504. Its totient is φ = 7217934336.

The previous prime is 18051344287. The next prime is 18051344347. The reversal of 18051344320 is 2344315081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051647 + ... + 1068673.

Almost surely, 2^18051344320 is an apocalyptic number.

18051344320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18051344320 is an abundant number, since it is smaller than the sum of its proper divisors (24948919184).

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

18051344320 is a wasteful number, since it uses less digits than its factorization.

18051344320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20357 (or 20347 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 18051344320 in words is "eighteen billion, fifty-one million, three hundred forty-four thousand, three hundred twenty".