18373872 has 160 divisors (see below), whose sum is σ = 57853440. Its totient is φ = 4956160.

The previous prime is 18373829. The next prime is 18373891. The reversal of 18373872 is 27837381.

It is a self number, because there is not a number n which added to its sum of digits gives 18373872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206404 + ... + 206492.

It is an arithmetic number, because the mean of its divisors is an integer number (361584).

Almost surely, 2^18373872 is an apocalyptic number.

18373872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18373872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28926720).

18373872 is an abundant number, since it is smaller than the sum of its proper divisors (39479568).

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

18373872 is a wasteful number, since it uses less digits than its factorization.

18373872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 145 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 18373872 is about 4286.4754752594. The cubic root of 18373872 is about 263.8762045849.

The spelling of 18373872 in words is "eighteen million, three hundred seventy-three thousand, eight hundred seventy-two".