18481100 has 72 divisors (see below), whose sum is σ = 44715888. Its totient is φ = 6572800.

The previous prime is 18481097. The next prime is 18481157. The reversal of 18481100 is 118481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58142 + ... + 58458.

It is an arithmetic number, because the mean of its divisors is an integer number (621054).

Almost surely, 2^18481100 is an apocalyptic number.

18481100 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 18481100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22357944).

18481100 is an abundant number, since it is smaller than the sum of its proper divisors (26234788).

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

18481100 is a wasteful number, since it uses less digits than its factorization.

18481100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 18481100 is about 4298.9649917160. The cubic root of 18481100 is about 264.3885272528.

Adding to 18481100 its reverse (118481), we get a palindrome (18599581).

It can be divided in two parts, 18481 and 100, that added together give a palindrome (18581).

The spelling of 18481100 in words is "eighteen million, four hundred eighty-one thousand, one hundred".