18320356 has 24 divisors (see below), whose sum is σ = 34080480. Its totient is φ = 8587392.

The previous prime is 18320353. The next prime is 18320363. The reversal of 18320356 is 65302381.

It is not an unprimeable number, because it can be changed into a prime (18320353) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28171 + ... + 28813.

It is an arithmetic number, because the mean of its divisors is an integer number (1420020).

Almost surely, 2^18320356 is an apocalyptic number.

It is an amenable number.

18320356 is a deficient number, since it is larger than the sum of its proper divisors (15760124).

18320356 is a wasteful number, since it uses less digits than its factorization.

18320356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 18320356 is about 4280.2284985734. The cubic root of 18320356 is about 263.6197655965.

The spelling of 18320356 in words is "eighteen million, three hundred twenty thousand, three hundred fifty-six".