18897100 has 36 divisors (see below), whose sum is σ = 41434848. Its totient is φ = 7480000.

The previous prime is 18897049. The next prime is 18897113. The reversal of 18897100 is 179881.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9165 + ... + 11035.

It is an arithmetic number, because the mean of its divisors is an integer number (1150968).

Almost surely, 2^18897100 is an apocalyptic number.

18897100 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 18897100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20717424).

18897100 is an abundant number, since it is smaller than the sum of its proper divisors (22537748).

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

18897100 is a wasteful number, since it uses less digits than its factorization.

18897100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 18897100 is about 4347.0794793746. The cubic root of 18897100 is about 266.3575759021.

The spelling of 18897100 in words is "eighteen million, eight hundred ninety-seven thousand, one hundred".