18218760 has 192 divisors, whose sum is σ = 66890880. Its totient is φ = 3886080.

The previous prime is 18218729. The next prime is 18218771. The reversal of 18218760 is 6781281.

It is a happy number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 444340 + ... + 444380.

It is an arithmetic number, because the mean of its divisors is an integer number (348390).

Almost surely, 2^18218760 is an apocalyptic number.

18218760 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 18218760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445440).

18218760 is an abundant number, since it is smaller than the sum of its proper divisors (48672120).

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

18218760 is a wasteful number, since it uses less digits than its factorization.

18218760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18218760 is about 4268.3439411556. The cubic root of 18218760 is about 263.1315586557.

The spelling of 18218760 in words is "eighteen million, two hundred eighteen thousand, seven hundred sixty".