18210000 has 100 divisors (see below), whose sum is σ = 58881152. Its totient is φ = 4848000.

The previous prime is 18209987. The next prime is 18210011. The reversal of 18210000 is 1281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29697 + ... + 30303.

Almost surely, 2^18210000 is an apocalyptic number.

18210000 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 18210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29440576).

18210000 is an abundant number, since it is smaller than the sum of its proper divisors (40671152).

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

18210000 is an equidigital number, since it uses as much as digits as its factorization.

18210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 18210000 is about 4267.3176586704. The cubic root of 18210000 is about 263.0893786539.

Adding to 18210000 its reverse (1281), we get a palindrome (18211281).

The spelling of 18210000 in words is "eighteen million, two hundred ten thousand".