18518346 has 96 divisors (see below), whose sum is σ = 51757056. Its totient is φ = 4644000.

The previous prime is 18518341. The next prime is 18518363. The reversal of 18518346 is 64381581.

It is a self number, because there is not a number n which added to its sum of digits gives 18518346.

It is not an unprimeable number, because it can be changed into a prime (18518341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42751 + ... + 43181.

It is an arithmetic number, because the mean of its divisors is an integer number (539136).

Almost surely, 2^18518346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18518346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25878528).

18518346 is an abundant number, since it is smaller than the sum of its proper divisors (33238710).

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

18518346 is a wasteful number, since it uses less digits than its factorization.

18518346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 18518346 is about 4303.2947842322. The cubic root of 18518346 is about 264.5660204239.

The spelling of 18518346 in words is "eighteen million, five hundred eighteen thousand, three hundred forty-six".