18423750 has 80 divisors (see below), whose sum is σ = 48921840. Its totient is φ = 4624000.

The previous prime is 18423679. The next prime is 18423751. The reversal of 18423750 is 5732481.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1083742 + ... + 1083758.

It is an arithmetic number, because the mean of its divisors is an integer number (611523).

Almost surely, 2^18423750 is an apocalyptic number.

18423750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18423750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24460920).

18423750 is an abundant number, since it is smaller than the sum of its proper divisors (30498090).

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

18423750 is an frugal number, since it uses more digits than its factorization.

18423750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 18423750 is about 4292.2895988039. The cubic root of 18423750 is about 264.1147630061.

18423750 divided by its sum of digits (30) gives a cube (614125 = 85³).

The spelling of 18423750 in words is "eighteen million, four hundred twenty-three thousand, seven hundred fifty".