18604340 has 48 divisors (see below), whose sum is σ = 41470464. Its totient is φ = 6998400.

The previous prime is 18604321. The next prime is 18604349. The reversal of 18604340 is 4340681.

It is a super-2 number, since 2×18604340² = 692242933671200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18604349) 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, 22535 + ... + 23345.

It is an arithmetic number, because the mean of its divisors is an integer number (863968).

Almost surely, 2^18604340 is an apocalyptic number.

18604340 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 18604340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20735232).

18604340 is an abundant number, since it is smaller than the sum of its proper divisors (22866124).

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

18604340 is a wasteful number, since it uses less digits than its factorization.

18604340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18604340 is about 4313.2748579241. The cubic root of 18604340 is about 264.9749115919.

The spelling of 18604340 in words is "eighteen million, six hundred four thousand, three hundred forty".