18522000 has 320 divisors, whose sum is σ = 77376000. Its totient is φ = 4233600.

The previous prime is 18521999. The next prime is 18522011. The reversal of 18522000 is 22581.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2645997 + ... + 2646003.

It is an arithmetic number, because the mean of its divisors is an integer number (241800).

Almost surely, 2^18522000 is an apocalyptic number.

18522000 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 18522000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38688000).

18522000 is an abundant number, since it is smaller than the sum of its proper divisors (58854000).

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

18522000 is an equidigital number, since it uses as much as digits as its factorization.

18522000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 18522000 is about 4303.7193217030. The cubic root of 18522000 is about 264.5834204779.

Adding to 18522000 its reverse (22581), we get a palindrome (18544581).

The spelling of 18522000 in words is "eighteen million, five hundred twenty-two thousand".