18240900 has 72 divisors (see below), whose sum is σ = 54100704. Its totient is φ = 4742400.

The previous prime is 18240899. The next prime is 18240907. The reversal of 18240900 is 904281.

It is not an unprimeable number, because it can be changed into a prime (18240907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11559 + ... + 13041.

Almost surely, 2^18240900 is an apocalyptic number.

18240900 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 18240900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27050352).

18240900 is an abundant number, since it is smaller than the sum of its proper divisors (35859804).

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

18240900 is a wasteful number, since it uses less digits than its factorization.

18240900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18240900 is about 4270.9366654166. The cubic root of 18240900 is about 263.2381040413.

The spelling of 18240900 in words is "eighteen million, two hundred forty thousand, nine hundred".