18661032 has 48 divisors (see below), whose sum is σ = 54430740. Its totient is φ = 5741568.

The previous prime is 18661009. The next prime is 18661043. The reversal of 18661032 is 23016681.

18661032 is a `hidden beast` number, since 18 + 6 + 610 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16208676 + 2452356 = 4026^2 + 1566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18660987 and 18661005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9033 + ... + 10904.

Almost surely, 2^18661032 is an apocalyptic number.

18661032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18661032 is an abundant number, since it is smaller than the sum of its proper divisors (35769708).

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

18661032 is a wasteful number, since it uses less digits than its factorization.

18661032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19962 (or 19955 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18661032 is about 4319.8416637650. The cubic root of 18661032 is about 265.2437865772.

The spelling of 18661032 in words is "eighteen million, six hundred sixty-one thousand, thirty-two".