18899850 has 48 divisors (see below), whose sum is σ = 47220192. Its totient is φ = 5002560.

The previous prime is 18899849. The next prime is 18899861. The reversal of 18899850 is 5899881.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18899850.

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, 24064 + ... + 24836.

It is an arithmetic number, because the mean of its divisors is an integer number (983754).

Almost surely, 2^18899850 is an apocalyptic number.

18899850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18899850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23610096).

18899850 is an abundant number, since it is smaller than the sum of its proper divisors (28320342).

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

18899850 is a wasteful number, since it uses less digits than its factorization.

18899850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 18899850 is about 4347.3957721836. The cubic root of 18899850 is about 266.3704958352.

The spelling of 18899850 in words is "eighteen million, eight hundred ninety-nine thousand, eight hundred fifty".