18489356 has 24 divisors (see below), whose sum is σ = 35238000. Its totient is φ = 8455104.

The previous prime is 18489349. The next prime is 18489379. The reversal of 18489356 is 65398481.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (1468250).

Almost surely, 2^18489356 is an apocalyptic number.

It is an amenable number.

18489356 is a deficient number, since it is larger than the sum of its proper divisors (16748644).

18489356 is a wasteful number, since it uses less digits than its factorization.

18489356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441 (or 8439 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 18489356 is about 4299.9251156270. The cubic root of 18489356 is about 264.4278911926.

The spelling of 18489356 in words is "eighteen million, four hundred eighty-nine thousand, three hundred fifty-six".