18330961 has 8 divisors (see below), whose sum is σ = 20151648. Its totient is φ = 16536000.

The previous prime is 18330941. The next prime is 18330979. The reversal of 18330961 is 16903381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18330961 - 2¹⁷ = 18199889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18330901) 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, 4920 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (2518956).

Almost surely, 2^18330961 is an apocalyptic number.

18330961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18330961 is a deficient number, since it is larger than the sum of its proper divisors (1820687).

18330961 is a wasteful number, since it uses less digits than its factorization.

18330961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12863.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 18330961 is about 4281.4671550766. The cubic root of 18330961 is about 263.6706224748.

It can be divided in two parts, 18330 and 961, that added together give a palindrome (19291).

The spelling of 18330961 in words is "eighteen million, three hundred thirty thousand, nine hundred sixty-one".