18236808 has 48 divisors (see below), whose sum is σ = 51994800. Its totient is φ = 5758560.

The previous prime is 18236807. The next prime is 18236809. The reversal of 18236808 is 80863281.

It is an interprime number because it is at equal distance from previous prime (18236807) and next prime (18236809).

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

It is not an unprimeable number, because it can be changed into a prime (18236807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5298 + ... + 8033.

It is an arithmetic number, because the mean of its divisors is an integer number (1083225).

Almost surely, 2^18236808 is an apocalyptic number.

18236808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18236808 is an abundant number, since it is smaller than the sum of its proper divisors (33757992).

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

18236808 is a wasteful number, since it uses less digits than its factorization.

18236808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362 (or 13355 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18236808 is about 4270.4575867230. The cubic root of 18236808 is about 263.2184184103.

It can be divided in two parts, 18236 and 808, that added together give a square (19044 = 138²).

The spelling of 18236808 in words is "eighteen million, two hundred thirty-six thousand, eight hundred eight".