18505332 has 36 divisors (see below), whose sum is σ = 47201700. Its totient is φ = 6112512.

The previous prime is 18505307. The next prime is 18505381. The reversal of 18505332 is 23350581.

It can be written as a sum of positive squares in 2 ways, for example, as 5588496 + 12916836 = 2364^2 + 3594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 18505296 and 18505305.

It is a congruent number.

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, 1794 + ... + 6342.

Almost surely, 2^18505332 is an apocalyptic number.

18505332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18505332 is an abundant number, since it is smaller than the sum of its proper divisors (28696368).

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

18505332 is a wasteful number, since it uses less digits than its factorization.

18505332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 18505332 is about 4301.7824212761. The cubic root of 18505332 is about 264.5040302034.

The spelling of 18505332 in words is "eighteen million, five hundred five thousand, three hundred thirty-two".