18729360 has 320 divisors, whose sum is σ = 74995200. Its totient is φ = 4257792.

The previous prime is 18729349. The next prime is 18729367. The reversal of 18729360 is 6392781.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18729367) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 645826 + ... + 645854.

It is an arithmetic number, because the mean of its divisors is an integer number (234360).

Almost surely, 2^18729360 is an apocalyptic number.

18729360 is a gapful number since it is divisible by the number (10) 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 18729360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37497600).

18729360 is an abundant number, since it is smaller than the sum of its proper divisors (56265840).

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

18729360 is a wasteful number, since it uses less digits than its factorization.

18729360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 18729360 is about 4327.7430607650. The cubic root of 18729360 is about 265.5671252919.

The spelling of 18729360 in words is "eighteen million, seven hundred twenty-nine thousand, three hundred sixty".