18550900 has 36 divisors (see below), whose sum is σ = 41122368. Its totient is φ = 7260640.

The previous prime is 18550891. The next prime is 18550907. The reversal of 18550900 is 905581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18550907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2727 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (1142288).

Almost surely, 2^18550900 is an apocalyptic number.

18550900 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 18550900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20561184).

18550900 is an abundant number, since it is smaller than the sum of its proper divisors (22571468).

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

18550900 is a wasteful number, since it uses less digits than its factorization.

18550900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008 (or 4001 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 18550900 is about 4307.0755739829. The cubic root of 18550900 is about 264.7209593930.

The spelling of 18550900 in words is "eighteen million, five hundred fifty thousand, nine hundred".