18459340 has 24 divisors (see below), whose sum is σ = 40451040. Its totient is φ = 7062528.

The previous prime is 18459313. The next prime is 18459349. The reversal of 18459340 is 4395481.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18459296 and 18459305.

It is not an unprimeable number, because it can be changed into a prime (18459349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19605 + ... + 20524.

It is an arithmetic number, because the mean of its divisors is an integer number (1685460).

Almost surely, 2^18459340 is an apocalyptic number.

18459340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18459340 is an abundant number, since it is smaller than the sum of its proper divisors (21991700).

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

18459340 is a wasteful number, since it uses less digits than its factorization.

18459340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40161 (or 40159 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18459340 is about 4296.4334045811. The cubic root of 18459340 is about 264.2847211344.

The spelling of 18459340 in words is "eighteen million, four hundred fifty-nine thousand, three hundred forty".