18320468 has 6 divisors (see below), whose sum is σ = 32060826. Its totient is φ = 9160232.

The previous prime is 18320461. The next prime is 18320521. The reversal of 18320468 is 86402381.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 1444804 = 4108^2 + 1202^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320461) 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 as a sum of consecutive naturals, namely, 2290055 + ... + 2290062.

It is an arithmetic number, because the mean of its divisors is an integer number (5343471).

Almost surely, 2^18320468 is an apocalyptic number.

It is an amenable number.

18320468 is a deficient number, since it is larger than the sum of its proper divisors (13740358).

18320468 is a wasteful number, since it uses less digits than its factorization.

18320468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580121 (or 4580119 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18320468 is about 4280.2415819671. The cubic root of 18320468 is about 263.6203028014.

The spelling of 18320468 in words is "eighteen million, three hundred twenty thousand, four hundred sixty-eight".