18498834 has 32 divisors (see below), whose sum is σ = 41730240. Its totient is φ = 6073056.

The previous prime is 18498833. The next prime is 18498863. The reversal of 18498834 is 43889481.

It is a self number, because there is not a number n which added to its sum of digits gives 18498834.

It is not an unprimeable number, because it can be changed into a prime (18498833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062 + ... + 6174.

It is an arithmetic number, because the mean of its divisors is an integer number (1304070).

Almost surely, 2^18498834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18498834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20865120).

18498834 is an abundant number, since it is smaller than the sum of its proper divisors (23231406).

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

18498834 is a wasteful number, since it uses less digits than its factorization.

18498834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191 (or 5185 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 18498834 is about 4301.0270866387. The cubic root of 18498834 is about 264.4730670842.

The spelling of 18498834 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred thirty-four".