18343612 has 48 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 7299072.

The previous prime is 18343609. The next prime is 18343613. The reversal of 18343612 is 21634381.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343613) 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, 42148 + ... + 42580.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^18343612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18343612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19686240).

18343612 is an abundant number, since it is smaller than the sum of its proper divisors (21028868).

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

18343612 is a wasteful number, since it uses less digits than its factorization.

18343612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 18343612 is about 4282.9443143707. The cubic root of 18343612 is about 263.7312654123.

Adding to 18343612 its reverse (21634381), we get a palindrome (39977993).

The spelling of 18343612 in words is "eighteen million, three hundred forty-three thousand, six hundred twelve".