18359872 has 14 divisors (see below), whose sum is σ = 36432998. Its totient is φ = 9179904.

The previous prime is 18359867. The next prime is 18359879. The reversal of 18359872 is 27895381.

It can be written as a sum of positive squares in only one way, i.e., 10653696 + 7706176 = 3264^2 + 2776^2 .

It is not an unprimeable number, because it can be changed into a prime (18359879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143373 + ... + 143500.

It is an arithmetic number, because the mean of its divisors is an integer number (2602357).

Almost surely, 2^18359872 is an apocalyptic number.

It is an amenable number.

18359872 is a deficient number, since it is larger than the sum of its proper divisors (18073126).

18359872 is an equidigital number, since it uses as much as digits as its factorization.

18359872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286885 (or 286875 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 18359872 is about 4284.8421207788. The cubic root of 18359872 is about 263.8091672625.

The spelling of 18359872 in words is "eighteen million, three hundred fifty-nine thousand, eight hundred seventy-two".