18132680 has 16 divisors (see below), whose sum is σ = 40798620. Its totient is φ = 7253056.

The previous prime is 18132661. The next prime is 18132683. The reversal of 18132680 is 8623181.

It can be written as a sum of positive squares in 2 ways, for example, as 18130564 + 2116 = 4258^2 + 46^2 .

It is not an unprimeable number, because it can be changed into a prime (18132683) 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 3 ways as a sum of consecutive naturals, for example, 226619 + ... + 226698.

Almost surely, 2^18132680 is an apocalyptic number.

18132680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18132680 is an abundant number, since it is smaller than the sum of its proper divisors (22665940).

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

18132680 is a wasteful number, since it uses less digits than its factorization.

18132680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453328 (or 453324 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18132680 is about 4258.2484662124. The cubic root of 18132680 is about 262.7164895855.

It can be divided in two parts, 181 and 32680, that multiplied together give a triangular number (5915080 = T₃₄₃₉).

The spelling of 18132680 in words is "eighteen million, one hundred thirty-two thousand, six hundred eighty".