18498340 has 48 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 6249600.

The previous prime is 18498313. The next prime is 18498341. The reversal of 18498340 is 4389481.

It is a self number, because there is not a number n which added to its sum of digits gives 18498340.

It is not an unprimeable number, because it can be changed into a prime (18498341) 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, 9010 + ... + 10870.

It is an arithmetic number, because the mean of its divisors is an integer number (938448).

Almost surely, 2^18498340 is an apocalyptic number.

18498340 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 18498340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522752).

18498340 is an abundant number, since it is smaller than the sum of its proper divisors (26547164).

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

18498340 is a wasteful number, since it uses less digits than its factorization.

18498340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18498340 is about 4300.9696581120. The cubic root of 18498340 is about 264.4707128663.

The spelling of 18498340 in words is "eighteen million, four hundred ninety-eight thousand, three hundred forty".