18673340 has 48 divisors (see below), whose sum is σ = 45384192. Its totient is φ = 6321216.

The previous prime is 18673339. The next prime is 18673349. The reversal of 18673340 is 4337681.

It is a junction number, because it is equal to n+sod(n) for n = 18673297 and 18673306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18673349) 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, 10817 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (945504).

Almost surely, 2^18673340 is an apocalyptic number.

18673340 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 18673340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22692096).

18673340 is an abundant number, since it is smaller than the sum of its proper divisors (26710852).

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

18673340 is a wasteful number, since it uses less digits than its factorization.

18673340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 18673340 is about 4321.2660181942. The cubic root of 18673340 is about 265.3020881591.

The spelling of 18673340 in words is "eighteen million, six hundred seventy-three thousand, three hundred forty".