18681376 has 24 divisors (see below), whose sum is σ = 42033600. Its totient is φ = 8006208.

The previous prime is 18681373. The next prime is 18681431. The reversal of 18681376 is 67318681.

It is not an unprimeable number, because it can be changed into a prime (18681371) 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, 41476 + ... + 41923.

It is an arithmetic number, because the mean of its divisors is an integer number (1751400).

Almost surely, 2^18681376 is an apocalyptic number.

18681376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18681376 is an abundant number, since it is smaller than the sum of its proper divisors (23352224).

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

18681376 is an equidigital number, since it uses as much as digits as its factorization.

18681376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83416 (or 83408 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 18681376 is about 4322.1957382793. The cubic root of 18681376 is about 265.3401399453.

The spelling of 18681376 in words is "eighteen million, six hundred eighty-one thousand, three hundred seventy-six".