18397368 has 160 divisors (see below), whose sum is σ = 58806000. Its totient is φ = 5322240.

The previous prime is 18397367. The next prime is 18397373. The reversal of 18397368 is 86379381.

It is a happy number.

It is a super-3 number, since 3×18397368³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 206668 + ... + 206756.

Almost surely, 2^18397368 is an apocalyptic number.

18397368 is a gapful number since it is divisible by the number (18) 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 18397368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29403000).

18397368 is an abundant number, since it is smaller than the sum of its proper divisors (40408632).

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

18397368 is a wasteful number, since it uses less digits than its factorization.

18397368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 134 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 18397368 is about 4289.2153128515. The cubic root of 18397368 is about 263.9886358745.

It can be divided in two parts, 183973 and 68, that added together give a square (184041 = 429²).

The spelling of 18397368 in words is "eighteen million, three hundred ninety-seven thousand, three hundred sixty-eight".