18132530 has 32 divisors (see below), whose sum is σ = 35522928. Its totient is φ = 6624000.

The previous prime is 18132509. The next prime is 18132539. The reversal of 18132530 is 3523181.

It can be written as a sum of positive squares in 8 ways, for example, as 9138529 + 8994001 = 3023^2 + 2999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18132496 and 18132505.

It is not an unprimeable number, because it can be changed into a prime (18132539) 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 15 ways as a sum of consecutive naturals, for example, 12440 + ... + 13820.

Almost surely, 2^18132530 is an apocalyptic number.

18132530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18132530 is a deficient number, since it is larger than the sum of its proper divisors (17390398).

18132530 is a wasteful number, since it uses less digits than its factorization.

18132530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 18132530 is about 4258.2308533005. The cubic root of 18132530 is about 262.7157651553.

The spelling of 18132530 in words is "eighteen million, one hundred thirty-two thousand, five hundred thirty".