18385732 has 12 divisors (see below), whose sum is σ = 32208876. Its totient is φ = 9183200.

The previous prime is 18385729. The next prime is 18385733. The reversal of 18385732 is 23758381.

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 12787776 = 2366^2 + 3576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18385691 and 18385700.

It is not an unprimeable number, because it can be changed into a prime (18385733) 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, 3438 + ... + 6970.

It is an arithmetic number, because the mean of its divisors is an integer number (2684073).

Almost surely, 2^18385732 is an apocalyptic number.

It is an amenable number.

18385732 is a deficient number, since it is larger than the sum of its proper divisors (13823144).

18385732 is a wasteful number, since it uses less digits than its factorization.

18385732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838 (or 4836 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 18385732 is about 4287.8586730442. The cubic root of 18385732 is about 263.9329681361.

The spelling of 18385732 in words is "eighteen million, three hundred eighty-five thousand, seven hundred thirty-two".