18625243 has 16 divisors (see below), whose sum is σ = 23396800. Its totient is φ = 14732928.

The previous prime is 18625241. The next prime is 18625249. The reversal of 18625243 is 34252681.

It is not a de Polignac number, because 18625243 - 2¹ = 18625241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18625241) 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 15 ways as a sum of consecutive naturals, for example, 2371 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (1462300).

Almost surely, 2^18625243 is an apocalyptic number.

18625243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18625243 is a deficient number, since it is larger than the sum of its proper divisors (4771557).

18625243 is an equidigital number, since it uses as much as digits as its factorization.

18625243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211 (or 4197 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 18625243 is about 4315.6972785403. The cubic root of 18625243 is about 265.0741124146.

The spelling of 18625243 in words is "eighteen million, six hundred twenty-five thousand, two hundred forty-three".