18613368 has 128 divisors (see below), whose sum is σ = 56635200. Its totient is φ = 5640192.

The previous prime is 18613339. The next prime is 18613373. The reversal of 18613368 is 86331681.

18613368 is a `hidden beast` number, since 1 + 8 + 613 + 36 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135796 + ... + 135932.

Almost surely, 2^18613368 is an apocalyptic number.

18613368 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 18613368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28317600).

18613368 is an abundant number, since it is smaller than the sum of its proper divisors (38021832).

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

18613368 is a wasteful number, since it uses less digits than its factorization.

18613368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 196 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18613368 is about 4314.3212675924. The cubic root of 18613368 is about 265.0177655112.

It can be divided in two parts, 18613 and 368, that added together give a palindrome (18981).

The spelling of 18613368 in words is "eighteen million, six hundred thirteen thousand, three hundred sixty-eight".