18336512 has 36 divisors (see below), whose sum is σ = 37515576. Its totient is φ = 8939520.

The previous prime is 18336511. The next prime is 18336517. The reversal of 18336512 is 21563381.

It is a super-2 number, since 2×18336512² = 672455344652288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18336511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9623 + ... + 11369.

Almost surely, 2^18336512 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 18336512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18757788).

18336512 is an abundant number, since it is smaller than the sum of its proper divisors (19179064).

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

18336512 is an equidigital number, since it uses as much as digits as its factorization.

18336512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1790 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 18336512 is about 4282.1153650970. The cubic root of 18336512 is about 263.6972347895.

Adding to 18336512 its reverse (21563381), we get a palindrome (39899893).

The spelling of 18336512 in words is "eighteen million, three hundred thirty-six thousand, five hundred twelve".