18849243 has 32 divisors (see below), whose sum is σ = 31256064. Its totient is φ = 9856512.

The previous prime is 18849239. The next prime is 18849253. The reversal of 18849243 is 34294881.

It is not a de Polignac number, because 18849243 - 2² = 18849239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18849253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12496 + ... + 13922.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^18849243 is an apocalyptic number.

18849243 is a deficient number, since it is larger than the sum of its proper divisors (12406821).

18849243 is a wasteful number, since it uses less digits than its factorization.

18849243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its digits is 55296, while the sum is 39.

The square root of 18849243 is about 4341.5714896797. The cubic root of 18849243 is about 266.1325351930.

The spelling of 18849243 in words is "eighteen million, eight hundred forty-nine thousand, two hundred forty-three".