18804340 has 24 divisors (see below), whose sum is σ = 41207040. Its totient is φ = 7194528.

The previous prime is 18804299. The next prime is 18804341. The reversal of 18804340 is 4340881.

It is a junction number, because it is equal to n+sod(n) for n = 18804299 and 18804308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18804341) 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, 19980 + ... + 20899.

It is an arithmetic number, because the mean of its divisors is an integer number (1716960).

Almost surely, 2^18804340 is an apocalyptic number.

18804340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18804340 is an abundant number, since it is smaller than the sum of its proper divisors (22402700).

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

18804340 is a wasteful number, since it uses less digits than its factorization.

18804340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40911 (or 40909 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18804340 is about 4336.3971220358. The cubic root of 18804340 is about 265.9210386165.

The spelling of 18804340 in words is "eighteen million, eight hundred four thousand, three hundred forty".